Description:
I have enabled the ODBC trace file on windows and I can see that the ODBC trace file is being created, but it is empty.
I'm using the Data Direct Drivers, but nothing is written to the ODBC trace file.
Solution:
On windows systems the ODBC layer is part of the operating system.
This issue has been documented by Data Direct and Microsoft as well:
http://knowledgebase.datadirect.com search for "ODBC Tracing on Windows Creates No File or Empty File"
http://support.microsoft.com/kb/274551
http://msdn.microsoft.com/en-us/library/ms711020(VS.85).aspx
If the Policy Server is running as a service, therefore you may need to enable the option "Machine-Wide tracing for all user identities" under the "Tracing Tab".