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DataServer for Microsoft SQL Server
Troubleshooting : ODBC options : ODBC driver problems

ODBC driver problems

The ODBC drivers use the Microsoft Windows DLL technology. A driver problem can leave the driver's DLL in an unstable state. In this case, the next attempt to connect to the driver might fail with a GPF or with an unexpected error message. If this occurs, you might need to unload the driver's DLL by using Windows utilities or by restarting Windows.
In addition, drivers utilized by ODBC can get overlaid with incompatible DLL versions as other products are installed on your system. You might need to reinstall ODBC drivers and products if such incompatibilities occur.