Nesting error foxpro ошибка - Не ошибается лишь тот, кто ничего не делает!

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Question
FOR XX = 1 TO 15 STEP 1
*
*
*
NEXT XX && <— Error is here rarely

Using the For/Next statement, the Nesting error arrises
rarely
why this happens ?

Answers

If you try to compile this you get such a compile error:

For xx = 1 to 10
If xx=1
Else
Next xx

What’s missing is no not NEXT or ENDFOR, but ENDIF. So look out for any nesting error in code inside the loop.

Bye, Olaf.

Olaf Doschke — TMN Systemberatung GmbH http://www.tmn-systemberatung.de
- Proposed as answer by
  
  Saturday, December 13, 2014 9:38 AM
- Marked as answer by
  Ed Price — MSFTMicrosoft employee
  Monday, March 16, 2015 8:23 AM
```
LOCAL ii as integer
FOR ii = 1 TO 15 STEP 1
	WAIT WINDOW "ii = " + STR(ii, 4)
NEXT ii
```
The above replicates the FOR loop you are using.

I have not received any errors after numerous runs of the above.

One thing to point out is that the NEXT ii statement is technically incorrect.

It should be just NEXT — so
```
LOCAL ii as integer
FOR ii = 1 TO 15 STEP 1
   WAIT WINDOW "ii = " + STR(ii, 4)
NEXT
```
The English Bob
- Proposed as answer by
  Ed Price — MSFTMicrosoft employee
  Saturday, December 13, 2014 9:38 AM
- Marked as answer by
  Ed Price — MSFTMicrosoft employee
  Monday, March 16, 2015 8:23 AM
What means «rarely»? Are you able to reproduce this error? If not then you cannot fix it probably. And I can say it is either a bug in your code or in VFP itself.

NEXT can generate Nesting error if the FOR command fails or if the VFP forgets about it etc. etc.

Did you try the VFP Compiler from
baiyujia? Does the bug appears in compiled code?
- Edited by
  Pavel Celba
  Thursday, October 30, 2014 11:34 PM
  link added
- Proposed as answer by
  Ed Price — MSFTMicrosoft employee
  Saturday, December 13, 2014 9:39 AM
- Marked as answer by
  Ed Price — MSFTMicrosoft employee
  Monday, March 16, 2015 8:23 AM
I remembered and found a tek-tips thread I wrote about having ERROR 96 «Nesting Error» at runtime.

http://www.tek-tips.com/viewthread.cfm?qid=1722110

The problem was never resolved, but in my case remained a one time only error. If ou have his rarely, but still too often, the best thing you may do is rewrite that passage to something else. Perhaps you put the large CASE statement into a procedure or other
method.

Taken from the tek-tips thread, one thinkable way to have this error at runtime is causing the issue mentioned in the help, an EXIT outside of a loop.

This here compiles and errors at runtime with error 96:
```
lcMacro = "Exit"
&lcMacro 
```
Nevertheless, this wasn’t my problem, nor do I think you do something causing an error by macro substitution.

It’s strange enough, that there is a native error number 96, while this rather is an error not thinkable at runtime, if there is no nesting error found at compile time. And compile time errors don’t have an error number, they are output and in case they’re
fatal they stop compilation.

Bye, Olaf.

Olaf Doschke — TMN Systemberatung GmbH http://www.tmn-systemberatung.de
- Proposed as answer by
  Ed Price — MSFTMicrosoft employee
  Saturday, December 13, 2014 9:39 AM
- Marked as answer by
  Ed Price — MSFTMicrosoft employee
  Monday, March 16, 2015 8:23 AM
To evaluate a nesting error, you have to evaluate the entire program. Sometimes the error can be caused in a program called after it (which makes it a little bit tricky). For example, your program is calling another procedure

Fernando, even when your comment is correct, about no need to put the variable after NEXT, i.e. FOR x=1 to 4 … NEXT xx, could be read as just NEXT; adding the variable, will make it easier to read, specially with a big code inside

As per procedure, I always add a comment when closing SCAN..ENDSCAN, DO WHILE..ENDDO, FOR..NEXT of which variables I am referring to, and many cases add the condition on the comment (at the end)
- Proposed as answer by
  Ed Price — MSFTMicrosoft employee
  Saturday, December 13, 2014 9:39 AM
- Marked as answer by
  Ed Price — MSFTMicrosoft employee
  Monday, March 16, 2015 8:24 AM
One computer, 3 out of 100 … you should also think about hardware problems.
- Marked as answer by
  Ed Price — MSFTMicrosoft employee
  Monday, March 16, 2015 8:24 AM

Источник

Nesting error at runtime?

(OP)

19 Nov 13 09:12

The strangest things happen lately:

I get error 96 (Nesting error) ereported in a certain inherited method, but in no particular line number (lineno() is 0)
This seems very weird to me, as a nesting error would stop the compilation at build time and would never be able to happen at runtime. The only way a nesting error could be expected at runtime is due to Execsript(), which is not in play here. Even macro substitution cannot cause it, as you can’t substitute anything needing multi line code to be nested at all.

So the master question is: In what circumstances could a nesting error occur?

One detail: The method in question is called PreSaveHook and called from the save method of a data access class:

CODE

If Not This.PreSaveHook()
   *--- If presave conditions fail, cancel save
   Return CANCEL
Endif

This is the lowest nesting level of the save method, so no nesting can be broken on this level, too. One further mentionable thing is, that data access objects may be «stacked», in that a parent object starts a transaction and trigger child objects save, after itself successfully saved.

At least it’s not urgent, because it wasn’t reproducable, but it would good to know how to get at the source of a nesting error, if one happens. ASTACKINFO is on my list, I thought it’s already used in the general error handler, but no stack info is reported in the error screenshot. Line 0 is something I normally only get, if a database trigger fails, but in this case the backend is MS SQL Server, not a DBF of a DBC.

Could a network error cause some object to fail and cause a nesting error?

Bye, Olaf.

Источник

***	bad date
***	Cannot allocate screen map.
***	Cannot create program workspace.
***	Cannot find spell check program.
***	Cannot open configuration file.
***	Cannot run on MS-DOS before version 3.0.
***	Fatal error <expN> reporting error <expN>.
***	Interrupted
***	Invalid compact EXE file. Rebuild EXE.
***	Invalid or missing EXE file.
***	Logical expression required.
***	Popup too big, first <expN> entries shown.
***	Product has not been properly installed.
***	Source code not found.
***	Source code out of date.
***	Unable to locate desired version of Visual FoxPro.
***	Unable to process error.
***	Unknown error code <expN>.

0001

1	File does not exist.
3	File is in use.
4	End of file encountered.
5	Record is out of range.
6	Too many files open.
7	File already exists.
9	Data type mismatch.
10	Syntax error.
11	Function argument value, type, or count is invalid.
12	Variable «<variable>» is not found.
13	Alias is not found.
15	Not a table.
16	Unrecognized command verb.
17	Table number is invalid.
18	Line is too long.
19	Index file does not match table.
20	Record is not in index.
21	Length of memory variable strings exceeds amount of memory.
22	Too many memory variables.
23	Index expression exceeds maximum length.
24	Alias name is already in use.
26	Table has no index order set.
27	Not a numeric expression.
30	Row or column position is off the screen.
31	Invalid subscript reference.
34	Operation is invalid for a Memo, General, or Picture field.
36	Command contains unrecognized phrase/keyword.
37	You must use a logical expression with FILTER.
38	Beginning of file encountered.
39	Numeric overflow. Data was lost.
41	Memo file is missing or is invalid.
42	The LOCATE command must be issued before the CONTINUE command.
43	There is not enough memory to complete this operation.
44	Cyclic relation.
45	Not a character expression.
46	Expression evaluated to an illegal value.
47	No fields found to process.
50	Report file is invalid.
52	No table is open.
54	Label file is invalid.
55	Memory variable file is invalid.
56	Not enough disk space for «<file name>».
58	LOG( ): Zero or negative used as argument.
61	SQRT argument cannot be negative.
62	Cannot access characters beyond string.
67	Expression evaluator failed.
78	** or ^ domain error.
91	File was not placed in memory using the LOAD command.
94	Must specify additional parameters.
95	Statement is not allowed in interactive mode.
96	Nesting error.

0100

101	Cannot open file «<file>».
102	Cannot create file «<file>».
103	Allowed DO nesting level exceeded.
104	Unknown function key.
107	Operator/operand type mismatch.
108	File is in use by another user.
109	Record is in use by another user.
110	File must be opened exclusively.
111	Cannot update the Cursor object.
112	Invalid key length.
114	Index does not match the table. Delete the index file and re-create the index.
115	.DIF file header is invalid.
116	.DIF vector is invalid — .DBF field mismatch.
117	.DIF type indicator is invalid.
119	.SYLK file header is invalid.
120	.SYLK file dimension bounds are invalid.
121	.SYLK file format is invalid.
124	Printer redirection is invalid.
125	Printer is not ready.
127	View file is invalid.
130	Record is not locked.
138	No fields were found to copy.
152	Missing expression.
164	Menu title has not been defined with DEFINE PAD.
165	Menu has not been defined with DEFINE POPUP.
166	No menu items have been defined for this menu.
167	Menu item position must be a positive number.
168	Menu has not been defined with DEFINE MENU.
169	Cannot define menu item.
170	Cannot release menu item.
174	Cannot redefine menu in use.
175	Cannot redefine a popup that is in use.
176	Cannot clear menu that is in use.
177	Cannot clear popup that is in use.
178	Menu has not been activated with ACTIVATE MENU.
179	Menu has not been activated with ACTIVATE POPUP.
181	Menu specified in ACTIVATE MENU is already in use.
182	Menu specified in ACTIVATE POPUP is already in use.

0200

202	Invalid path or file name.
214	Window «<name>» has not been defined with DEFINE WINDOW.
215	Window has not been activated with ACTIVATE WINDOW.
216	Display mode is not available.
221	Left margin including indent must be less than the right margin.
222	Line number must be less than page length.
223	Column number must be between 0 and 255.
225	«<name>» is not a memory variable.
226	«<name>» is not a file variable.
227	Box dimensions are invalid.
228	Tab stops must be in ascending order.
230	Array dimensions are invalid.
231	Invalid argument used with the SET function.
255	Not a valid RapidFile database.
256	Not a valid Framework II database/spreadsheet.
279	Menu was not pushed.
287	Menu size is too small.
291	Expression used with ASIN( ) is out of range.
292	Cannot use 0 or negative as the argument for LOG10( ).
293	Expression used with ACOS( ) is out of range.
297	Lotus 1-2-3 version 2.0 file format is invalid.

0300

1000

1100

1102	Cannot create file.
1103	Invalid seek offset.
1104	Error reading file.
1105	Error writing to file.
1106	Cannot access file; transaction is in progress.
1108	Picture too big, corrupt, or in wrong format.
1111	Invalid file descriptor.
1112	Error closing the file.
1113	File is not open.
1115	Invalid operation for the Cursor object.
1117	Key field length does not match.
1124	Key exceeds allowed size.
1126	Record is too long.
1127	You must use a logical expression with a FOR or WHILE clause.
1130	‘field’ phrase is not found.
1131	The file specified in the FROM clause is empty.
1134	Variable must be in the selected table.
1140	FILTER expression exceeds allowed size.
1141	Unrecognized file revision. Re-create the index.
1145	Must be a character or numeric key field.
1147	Target table is already engaged in a relation.
1148	Expression has been re-entered while the filter is executing.
1149	Not enough memory for buffer.
1150	Not enough memory for file map.
1151	Not enough memory for filename.
1152	Cannot access the selected table.
1153	Cannot rename the file to different device.
1156	Duplicate field names.
1157	Cannot update the file.
1161	Too many records to browse or edit in the demo version.
1162	Procedure «<procedure>» is not found.
1163	Browse table is closed.
1164	Browse structure has changed.
1165	«<field>» is not related to the current work area.
1166	Cursor is corrupt or in wrong format.
1167	Icon is corrupt or in wrong format.
1168	Could not add icon to executable file.
1169	Project file is read-only.
1178	Application file «<file>» is not closed.
1193	Missing .RTT section.
1194	Link command failed.
1195	Object file «<file>» was compiled in a previous version of FoxPro.
1196	«<file>» is not a Visual FoxPro .EXE file.

1200

1201	Too many names used.
1202	Program is too large.
1206	Recursive macro definition.
1211	ELSE or ENDIF does not have corresponding IF statement.
1212	Structure nesting is too deep.
1213	CASE, ENDCASE, or OTHERWISE does not have corresponding DO CASE statement.
1214	ENDTEXT does not have corresponding TEXT statement.
1217	Picture error in GET statement.
1220	Command contains invalid character.
1221	Command is missing required clause.
1223	Invalid variable reference.
1225	Must be a memory or array variable.
1226	Must be a file variable.
1229	Too few arguments.
1230	Too many arguments.
1231	Missing operand.
1232	DIMENSION contains variable declaration without required subscript arguments.
1234	Subscript is outside defined range.
1235	Structure is invalid.
1236	Suspend program before using RESUME.
1238	No PARAMETER statement is found.
1241	Improper data type in the group expression.
1242	Syntax error in the field expression.
1243	Internal error: Too many characters in the report.
1245	Invalid expression in label definition file.
1246	Total label width exceeds allowed size.
1249	Too many READ commands are in effect.
1250	Too many PROCEDURE commands are in effect.
1252	Compiled code for this line is too long.
1253	Cannot rename the current directory.
1254	Cannot nest key labels.
1255	Key label «<label>» is invalid.
1256	Mismatched braces in key label.
1257	Key string is too long.
1258	Error in the PICTURE clause.
1294	FOXUSER.DBF file is invalid.
1296	Error reading the resource.
1297	Command is allowed only in interactive mode.
1298	«<name>» band is too large to fit on page.

1300

1300	Function name is missing ).
1304	Function name is missing (.
1306	Missing comma (,).
1307	Cannot divide by 0.
1308	Insufficient stack space.
1309	«<file>» is not an object file.
1310	Too many characters are specified in the PICTURE clause.
1313	Class creation canceled.
1337	Cannot nest the PRINTJOB command.
1338	File is the wrong version.

1400

1405	RUN\|! command failed.
1410	Unable to create temporary work files.
1411	RUN\|! command string is too long.
1412	Cannot locate the COMSPEC environment variable.
1420	OLE object is invalid or corrupted.
1421	Cannot activate the OLE server.
1422	Error saving the OLE object.
1423	Error creating the OLE object.
1424	Error copying the OLE object to Clipboard.
1426	OLE error code 0x»<name>».
1427	OLE IDispatch exception code «<name>».
1428	OLE IDispatch exception code %d from «<name>»: «<name>».
1429	«<name>».
1431	Maximum number of OLE arguments is exceeded.
1434	Class «<name>» has not been registered.
1462	«<name>» internal consistency error.
1465	SQL pass-through internal consistency error.
1466	Connection handle is invalid.
1467	Property is invalid for local Cursors.
1468	Property is invalid for a Cursor based on a table.
1469	Property value is out of bounds.
1470	Incorrect property name.
1471	Incorrect column format.
1473	Environment-level property is invalid.
1474	Invalid call issued while executing a SQLEXEC( ) sequence.
1475	Invalid call issued while executing a SQLMORERESULTS( ) sequence.
1476	Invalid call issued while executing a SQLTABLES( ) sequence.
1477	Invalid call issued while executing a SQLCOLUMNS( ) sequence.
1478	The ChildOrder property of a relation object in the data environment is no longer valid. The relation is being removed.
1479	Invalid update column name «<name>».
1480	Warning: The connection sync/async mode cannot be set.
1481	Warning: The connection timeout cannot be set.
1482	Warning: The query timeout cannot be set.
1483	Warning: The connection packet size cannot be set.
1484	Warning: The next «<string>» modified records have already been updated remote.
1485	Warning: Invalid data conversion(s) starting at record «<name>».
1486	Warning: Invalid memo field conversions starting at record «<name>».
1487	Warning: The connection transaction mode cannot be set.
1490	Saving a converted form as a class is not supported.
1491	No update tables are specified. Use the Tables property of the Cursor object.
1492	No key columns specified for the update table «<name>». Use the «KeyFieldList» property of the Cursor object.
1493	SQL parameter is missing.
1494	View definition has been changed.
1495	Warning: The key defined by the KeyField property for table «<alias>» is not unique.
1496	Warning: No information is available to check remote update conflicts.
1497	Connection name is invalid.
1498	SQL SELECT statement is invalid.
1499	SQL parameter «<name>» is invalid.

1500

1502	Cannot write to the record because it is in use.
1503	File cannot be locked.
1507	Screen code is too large for available memory.
1508	Error initializing OLE.
1509	Conversion canceled. Adjust the memo BLOCKSIZE.
1510	Invalid file format. If this is a dBASE file, it must be converted first. To convert it, type MODIFY LABEL <labelfilename>.
1520	No database is open or set as the current database.
1521	This operation not supported for class member objects.
1522	Connectivity internal consistency error.
1523	Execution was canceled by the user.
1524	The selected printer driver does not support direct access.
1525	Function is not supported on remote tables.
1526	Connectivity error: «<name>».
1527	Cannot locate ODBC library, ODBC32.DLL.
1528	ODBC entry point missing, «<name>».
1529	File «<name>» already exists as part of a database.
1530	Fetching canceled; remote table is closed.

1532	Type conversion is not supported.
1533	This property is read-only.
1534	Database «<alias>» is not open.
1535	Cannot close this database because it is being used by a project container.
1536	Function is not supported on native tables.
1538	A stored procedure is executing.
1539	Trigger failed.
1540	Session number is invalid.
1541	Connection «<name>» is busy.
1542	Base table fields have been changed and no longer match view fields. View field properties cannot be set.
1543	Type conversion required by the DataType property for field «<name>» is invalid.
1544	DataType property for field «<name>» is invalid.
1545	Table buffer for alias «<name>» contains uncommitted changes.
1546	Cannot close table during execution of a table-bound expression.
1547	Cannot insert an empty row from a view into its base table(s).
1548	Table «<alias>» has one or more non-structural indexes open. Please close them and retry the Begin Transaction.
1549	Data session #<number> cannot be released with open transaction(s).
1550	.DBC internal consistency error.
1551	File «<name>» is an invalid database.
1552	File «<name>» is not a database.
1553	File «<name>» is a database.
1554	Error instatiating cursor object. Table «<alias>» cannot be opened. Object will be ignored.
1557	The database must be opened exclusively.
1558	File «<name>» is not part of a database.
1559	Property is not found.
1560	Invalid property value type.
1561	Database is invalid. Please validate.
1562	Cannot find object «<name>» in the database.
1563	Cannot find view «<name>» in the current database.
1564	Table «<name>» already exists in the database.
1565	File «<name>» is part of a database.
1566	Cannot issue the PACK command on a database while its tables are in use.
1568	View fields have been changed. The Update and Key field properties have been reset to the default values.
1569	Database «<name>»: File access denied.
1570	Database is read-only.
1571	The name «<name>» is already used for another object. Please choose a different name.
1575	Object name is invalid.
1576	Class «<name>» is not found in the class library.
1577	Table «<name>» is referenced in a relation.
1578	Invalid database table name.
1579	Command cannot be issued against a table with Cursors in table buffering mode.
1580	Feature is not supported for non-.DBC tables.
1581	Field «<name>» does not accept null values.
1582	Field «<name>» validation rule is violated.
1583	Record validation rule is violated.
1584	Error reading a property from the database. The property is ignored.
1585	Update conflict. Use TABLEUPDATE( ) with the lForce parameter to commit the update or TABLEREVERT( ) to roll back the update.
1586	Function requires row or table buffering mode.
1587	Illegal nested OLDVAL( ) or CURVAL( ).
1588	INSERT cannot be issued when row or table buffering is enabled or when integrity constraints are in effect.
1589	Table or row buffering requires that SET MULTILOCKS is set to ON.
1590	BEGIN TRANSACTION command failed. Nesting level is too deep.
1591	END TRANSACTION command cannot be issued without a corresponding BEGIN TRANSACTION command.
1592	ROLLBACK command cannot be issued without a corresponding BEGIN TRANSACTION command.
1593	Command cannot be issued within a transaction.
1594	Illegal to take file lock after record locks in transaction.
1595	Update conflict. Some of your changes in the current row batch were commited. Use TABLEUPDATE( ) with the lForce parameter to commit the update or the manual transaction to roll back the update.
1596	Table buffering is not enabled.
1597	Views require either DB_BUFOPTROW or DB_BUFOPTTABLE.
1598	Rule and trigger code must balance transaction usage.
1599	Data session #<number> was forced to ROLLBACK back all transactions to avoid deadlock.

1600

1600	Not enough memory to open a table with the USE command.
1604	No menu bar is defined.
1605	No menu is defined.
1607	Maximum menu items allowed (128) is exceeded.
1608	Maximum menus allowed (25) is exceeded.
1609	Maximum menu item length (50) is exceeded.
1611	Menu items and titles must be type Character.
1612	No such menu or menu item is defined.
1621	No menu titles have been defined for this menu.
1632	Window file format is invalid.
1637	File must be opened exclusively to convert the Memo file.
1642	Color set resource is not found.
1643	Printer driver is corrupted.
1644	Printer driver is not found.
1645	Report contains a nesting error.
1646	Total field type must be Date or Numeric.
1647	Field expression contains an invalid data type.
1649	No previous PRINTJOB command to correspond to this command.
1651	CANCEL or SUSPEND is not allowed.
1652	Invalid use of a Visual FoxPro function as an array.
1653	Label nesting error.
1657	Column number must be between 0 and the right margin.
1659	The table has memo fields that cannot be converted while open read-only.
1661	Microsoft Excel file format is invalid.
1662	Lotus 1-2-3 version 1.0 file format is invalid.
1670	Multiplan version 4.0 file format is invalid.
1671	Cannot import from password-protected file.
1672	Cannot append from password protected file.
1673	Symphony version 1.0 file format is invalid.
1674	Symphony version 1.1 file format is invalid.
1678	Lotus 1-2-3 version 3.0 file format is invalid.
1679	Import only Worksheet A for Lotus 1-2-3 version 3.0 files.
1680	Worksheet A for Lotus 1-2-3 version 3.0 file is hidden.
1681	PREVIEW clause is not allowed with OFF/NOCONSOLE or TO PRINT/FILE.
1682	Not a user-defined window.
1683	Index tag is not found.
1684	Index tag or file name must be specified.
1685	Project file is invalid.
1686	Form file «<name>» is invalid.
1687	Menu file is invalid.
1688	Paradox file format is invalid.
1689	Cannot build an .APP or .EXE file without a main program.
1690	Table operation is invalid during indexing.
1691	Library file is invalid.
1692	Unresolvable REGIONAL name conflict.
1693	Cannot find the menu-generation program.
1694	Too many extensions are specified.
1695	COLUMN \| FORM \| ALIAS \| NOOVERWRITE \| WIDTH are only allowed with the FROM clause.
1696	NOWAIT \| SAVE \| NOENVIRONMENT \| IN \| WINDOW clauses are not allowed with the FROM clause.
1698	COLUMN \| ROW \| ALIAS \| NOOVERWRITE \| SIZE \| SCREEN are only allowed with the FROM clause.

1700

1705	File access is denied.
1706	Cannot sort .IDX files in descending order.
1707	Structural .CDX file is not found.
1708	File is open in another work area.
1710	MULTISELECT or MOVER clause is not supported for PROMPT style menus.
1711	API library revision mismatch. Rebuild library.
1712	Field name is a duplicate or invalid.
1713	Field width or number of decimal places is invalid.
1715	Server «<server>» is not found.
1716	Queue «<queue>» is not found.
1717	Unable to generate a printer driver.
1718	File is read-only.
1719	Object file «<name>» is in use and cannot be removed from memory.
1720	Cannot issue the SET FORMAT command while a READ command is in progress on a format file.
1722	Preprocessor expression is invalid.
1723	Mismatched #IF/#ELSIF/#ELSE/#ENDIF.
1724	Missing #ENDIF.
1725	Constant is already created with #DEFINE.
1726	API library is not found.
1727	A .DBF-style Help file is required.
1728	Color scheme is reserved.
1731	Cannot modify a base class.
1732	Data type is invalid for this property.
1733	Class definition «<name>» is not found.
1734	Property «<name>» is not found.
1735	Error in the class definition.
1736	Error instantiating the object.
1737	«<name>» is a method, event, or object.
1738	Property «<name>» is not a method or event.
1739	Property setting will not take effect until data environment reloaded.
1740	«<name>» is a read-only property.
1741	Cannot add «<name>». Class definition is cyclical.
1742	The data source for this object must be a variable reference.
1743	Property «<name>» is read-only.
1744	Object class is invalid for this container.
1746	Class file name for «<name>» is not valid.
1747	Class file «<name>» is invalid.
1749	Form (.SCX) file must contain at least one Form.
1750	File version was created in a later version of Visual FoxPro than the current version.
1751	Class file version is greater than the current version.
1752	Class is in use by MODIFY CLASS.
1753	Cannot load 32-bit DLL «<name>».
1754	Cannot find entry point «<name>» in the DLL.
1755	Cannot add an object to this class.
1757	Property «<name>» is protected.
1758	Cannot change property «<name>» in SetAll method.
1759	Expression is invalid. Use a valid expression for «<name>» property.
1760	Member «<name>» is a class member.
1761	Class «<name>» already exists.
1762	Class «<name>» is not found.
1763	Property «<name>» already exists.
1764	Array is not a member of the parent object.
1765	Method contains syntax errors. Method is not saved.
1766	Object «<name>» is not found.
1767	Parent object will not allow this property setting for «<name>».
1768	Cannot add this object to a Grid.
1769	Cannot add this object to a Column.
1770	Cannot clear a class that is in use.
1771	A member object with this name already exists.
1773	Database object type is invalid.
1774	No sheet is found.
1775	Worksheet «<name>» is not found.
1776	Class «<name>» is in use.
1777	Cannot modify the structure of a view cursor.
1778	The table must be converted before appending.
1779	Error adding «<name>» to the object. Duplicate member/property name.
1780	This array element has been defined as an object and cannot be redefined in the class definition.
1781	An objects control source cannot be set to its Value property.
1782	This OLE property cannot be an expression.
1795	Cannot arrange an untransported form.
1796	No records are found for the current platform.
1797	Error occurred in conversion.
1798	Cannot find the converter program.

1800

1800	SQL: Internal error.
1801	SQL: Error correlating fields.
1802	SQL: Cannot locate table.
1803	SQL: HAVING clause is invalid.
1804	SQL: Statement is invalid.
1805	SQL: Too many subqueries.
1806	SQL: Column «<field> \| <variable>» is not found.
1807	SQL: GROUP BY clause is invalid.
1808	SQL: ORDER BY clause is invalid.
1809	SQL: Out of memory.
1810	SQL: Invalid use of subquery.
1811	SQL: Aggregate on non-numeric expression.
1812	SQL: Statement too long.
1813	SQL: Use of UNION in subquery is invalid.
1814	SQL: Queries of this type are not supported.
1815	«<cursor>» must be created with SELECT … INTO TABLE.
1818	SQL: FROM clause is required.
1819	SQL: DISTINCT is invalid.
1820	SQL: SELECT contains invalid *.
1822	SQL: Invalid aggregate field.
1825	SQL: Subquery is invalid.
1826	SQL: SELECT is invalid.
1828	SQL: Illegal GROUP BY in subquery.
1830	SQL: Index is not found.
1831	SQL: Error building temporary index.
1832	«<field> \| <variable>» is not unique and must be qualified.
1833	SQL: WHERE clause is invalid.
1834	SQL: Too many UNIONs.
1839	SQL: Operation was canceled.
1841	SQL: Too many columns referenced.
1842	SQL: Subquery nesting is too deep.
1844	Cannot nest aggregate functions.
1845	SQL expression is too complex.
1846	Cannot GROUP by aggregate field.
1851	SELECTs are not UNION compatible.
1860	Subquery returned more than one record.
1864	SQL: Too many fields in UPDATE.
1865	SQL: Invalid SET expression in UPDATE.
1870	ALTER TABLE operation interrupted.
1871	Cannot DROP all existing columns.
1872	Too many columns.
1875	Too many key changes defined.
1877	No rule to DROP.
1878	No default value to DROP.
1879	No primary key.
1880	Related table is not found in current database.
1881	Error loading: «<error>».
1882	Related tag is not found or not primary or candidate.
1883	Primary key already exists.
1884	Uniqueness of index «<name>» is violated.
1885	Only structural tags can be defined as candidate.
1886	Index does not accept NULL.
1887	Illegal recursion in rule evaluation.
1888	Tag name is too long.
1889	A table in multiple relationships can only have one child order.

1900

1903	String is too long to fit.
1907	Drive specifier is invalid.
1908	Length or decimal place argument is invalid.
1910	Illegal printer driver recursion.
1911	Localized product is required for this environment.
1912	Operation is invalid for a General field.
1913	Field must be a General field.
1914	Code page number is invalid.
1915	Collating sequence «<name>» is not found.
1916	To use this feature, set CODEPAGE=AUTO in your CONFIG.FPW file and restart Visual FoxPro.
1918	File name is too long.
1922	Volume does not exist.
1923	Object «<name>» is not found.
1924	«<name>» is not an object.
1925	Unknown member «<name>».
1926	Cannot nest class definitions.
1927	Statement is not valid in a class definition.
1928	Statement is only valid within a class definition.
1929	«<name>» can only be used within a method.
1930	Cannot redefine «<name>».
1931	Statement is not in a procedure.
1932	«<name>» cannot be closed while suspended.
1933	File «<name>» is not closed.
1934	Statement only valid within a method.
1935	The current object does not inherit from class «<name>».
1937	Procedure file «<name>» is not found.
1938	Object is not contained in a «<name>».
1939	WITH/ENDWITH mismatch.
1940	Expression is not valid outside of WITH/ENDWITH.
1942	Objects cannot be assigned to arrays.
1943	Member «<name>» does not evaluate to an object.
1944	Cannot find the builder program.
1945	The current object has been released.
1947	Expression is too complex.
1948	Cannot modify a class that is in use.
1949	Class name is invalid.
1950	Class definition «<name>» is recursive.
1951	Cannot clear the object in use.
1953	Feature is only available if the object is in design mode.
1954	The builder program is already running.
1955	WIN.INI/registry is corrupted.
1956	Printer access denied.
1957	Error accessing printer spooler.
1958	Error loading printer driver.
1960	Illegal redefinition of variable «<name>».
1961	A subdirectory or file «<name>» already exists.
1962	The directory is not empty.
1963	Directory is not found.
1964	No PageFrame or Page is found in FormSet or Form with WindowType set to READ or READ MODAL.
1965	One of the members of this class is based on a nonvisual class. Cannot write .VCX file.
1966	Data environment is already loaded.
1967	Data environment is already unloaded.
1968	One of the members of this Form or FormSet is based on a nonvisual class. Cannot write .SCX.
1969	The clipboard contained one or more objects that could not be added to the container. Those objects were not pasted.
1970	Cannot reopen project file «<name>».
1971	Cannot compile until the current COMPILE command has completed.
1972	Array «<name>» is in use.
1973	Error creating table: «<name>».
1974	Arrays cannot be assigned to array elements.
1975	Member object «<name>» has not been instantiated.
1976	Cannot resolve back link.
1977	Exclusive open required to update this file. Please reopen.
1978	Cannot visually modify a class of this type.
1979	Cannot visually modify a class based on a nonvisual class.
1981	Compile error in file «<name>».
1982	The TO clause can only be used with modal Forms and FormSets.
1983	«<name>» objects cannot return a value.
1984	The fields in table «<name>» did not match the entries in the database.
1985	Object already has a data environment, cannot use another one with the SaveAs method.
1986	GDI memory is low, close one or more windows and try again.
1987	Objects cannot be programmatically added to the Form Designers FormSet.
1988	Currency value is out of range.
1989	Objects cannot be programmatically deleted from the Form Designer.
1991	Form file «<name>» is from a previous version of FoxPro. It must be converted to the current format before it can be executed.
1993	Class library file «<name>» is not found.
1994	Include file «<name>» is not found.
1995	Error loading the data environment. Table is in use.
1996	The validation rule for field «<name>» does not evaluate to a logical or NULL type.
1997	The default value for field «<name>» does not evaluate to the correct type for the field.
1998	The index expression for index «<name>» contains an invalid reference to a Memo, General, or Picture field.
1999	Function is not implemented.

Источник

Article: Q192081
Product(s): Microsoft FoxPro
Version(s): WINDOWS:5.0,5.0a,6.0
Operating System(s): 
Keyword(s): 
Last Modified: 13-AUG-1999

-------------------------------------------------------------------------------
The information in this article applies to:

- Microsoft Visual FoxPro for Windows, versions 5.0, 5.0a, 6.0 
-------------------------------------------------------------------------------

SYMPTOMS
========

Using the Printer button on the Visual FoxPro Standard toolbar while a report is
in Preview mode causes the following error to occur:

  Report contains a nesting error.

RESOLUTION
==========

- Select the Printer icon on the Print Preview toolbar instead of the Printer
  icon on the Visual FoxPro Standard toolbar.

  -or-

- Add a NOWAIT clause to the end of the REPORT...PREVIEW command.

STATUS
======

Microsoft is researching this problem and will post new information here in the
Microsoft Knowledge Base as it becomes available.

MORE INFORMATION
================

Steps to Reproduce Behavior
---------------------------

1. Create a quick report with a table and save the report as MyRpt.

2. Run the following code in Command window:

        USE <tablename>
        REPORT FORM myRpt PREVIEW

3. When the Report Preview window opens, click the Printer button on the Visual
  FoxPro Standard toolbar, not the printer button on the Print Preview toolbar,
  to print the report and you see the following error message appear:

  Report contains a nesting error.

If a report is being edited using the Report Designer, then the error message
does not occur when that report is printed, as outlined in this article.

Additional query words: kbVFp500a kbVFp500 kbVFp600 kbPrinting kbReportWriter

======================================================================
Keywords          :  
Technology        : kbVFPsearch kbAudDeveloper kbVFP500 kbVFP600 kbVFP500a
Version           : WINDOWS:5.0,5.0a,6.0
Issue type        : kbprb
Solution Type     : kbpending

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS
PROVIDED «AS IS» WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS
ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO
EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR
ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL,
CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF
MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION
OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES
SO THE FOREGOING LIMITATION MAY NOT APPLY.

Источник

Господа!

Есть одна программулина на FoxPro (древний под ДОС), работала нормально некоторое время, потом без видимой причины стала ругаться «nesting error». я так понимаю ошибка это синтаксическая, дело в несоответствии открывающего и закрывающего оператора (if endif итд). посмотрел исходник, там на мой взгляд все верно. да и не менял там никто ничего!

вообщем если кто может что-нибудь конкретное сказать (или спросить) буду рад.

Внимательней надо смотреть. Мож где что лишнего впечатал или затер. «Ошибка вложения» пишет,.

Программку написал не я, все работало некоторое время. потом стала ругаться как я писал выше. Никто в исходнике ничего не менял, пробовал достать из арихвной копии, тех времен, когда работала прога — не помогло. Может такое быть из-за изменения структуры БД? Человека этого сейчас нет, спросить не у кого.

Во вложении весь исходник (оригинальное расширение — .prg).

Тонкости языка уже подзабыл. Если программа выполнялась в одной и той же оболочке, то не исключено, что нарушены какие-нибудь ограничения (размер БД. число открытых баз и т. п. ). Возможно были изменены настройки самой оболочки.

Источник

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Nesting error at runtime?

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