You receive an "Unable to write to file buffer State:S1000" error message when you call the Open method for a CDatabase or CRecordset object in Visual C++ (115516)
The information in this article applies to:
- The Microsoft Foundation Classes (MFC), when used with:
- Microsoft Visual C++ for Windows, 16-bit edition 1.5
- Microsoft Visual C++ for Windows, 16-bit edition 1.51
- Microsoft Visual C++ for Windows, 16-bit edition 1.52
- Microsoft Visual C++, 32-bit Editions 2.0
- Microsoft Visual C++, 32-bit Editions 2.1
- Microsoft Visual C++, 32-bit Editions 4.0
- Microsoft Visual C++, 32-bit Editions 4.1
- Microsoft Visual C++, 32-bit Enterprise Edition 4.2
- Microsoft Visual C++, 32-bit Enterprise Edition 4.2b
- Microsoft Visual C++, 32-bit Enterprise Edition 5.0
- Microsoft Visual C++, 32-bit Enterprise Edition 6.0
- Microsoft Visual C++, 32-bit Professional Edition 4.2
- Microsoft Visual C++, 32-bit Professional Edition 4.2b
- Microsoft Visual C++, 32-bit Professional Edition 5.0
- Microsoft Visual C++, 32-bit Professional Edition 6.0
- Microsoft Visual C++, 32-bit Learning Edition 6.0
- Microsoft Visual C++ .NET (2002)
- Microsoft Visual C++ .NET (2003)
- Microsoft Data Access Components 2.5
This article was previously published under Q115516 SYMPTOMSWhen you call the Open method for a
CDatabase or CRecordset object, you receive one of the following error messages General error: Unable to
create file buffer.
State:S1000,Native:0,Origin:[Microsoft][ODBC Cursor
Library] General error: Unable to write to file
buffer
State:S1000, Native:0, Origin:[Microsoft][ODBC Cursor Library]
General error: Unable to close file
buffer
State:S1000, Native:0, Origin:[Microsoft][ODBC Cursor Library]
CAUSE By default, the MFC ODBC CDatabase class loads the ODBC
cursor library (16 bit: ODBCCURS.DLL, 32 bit: ODBCCR32.dll). This allows an
application to define snapshot recordsets (the default) and scroll backward as
well as forward through the recordset. This cursor library caches the records
of a snapshot. To perform the caching, the 16-bit cursor library creates a
temporary file in the directory that is specified by the TEMP environment variable or,
if the TEMP variable is not defined, in the current directory. The 32-bit
cursor library creates a temporary file in the current directory. A temporary
file is created for each CRecordset object created. If the temporary file
cannot be created, the error shown above occurs. This error most likely occurs
for one of the following reasons: - There are not enough file handles available for the
application.
- There is not enough hard disk space available to create the
file.
RESOLUTION To avoid the error message, increase the number of available file
handles for the application. This can be done by calling the Windows API
function SetHandleCount. Also, increase the number specified by the "FILES="
line in the Config.sys file.
Note In Microsoft Windows NT, calling
the SetHandleCount function has no effect and Windows NT ignores the Config.sys file.
Windows NT limits file handles solely on the amount of available memory.
Make sure that there is plenty of disk space available in the
directory that is specified by the TEMP environment variable or the current working
directory.
| Modification Type: | Major | Last Reviewed: | 9/1/2005 |
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| Keywords: | kbtshoot kbDatabase kbFileIO kbprb KB115516 kbAudDeveloper |
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