PRB: Error: "Failed to Get Expression Service"

SYMPTOMS

Installation of ODBC 16-bit components with incompatible versions of OLE DLLs causes the error "Failed to get expression service."

The installation of ODBC 2.1x SDK on a fresh installation of Windows 95 also causes the error message described above.

The following table shows the difference in version numbers of the OLE DLLs that cause this problem.

                               Version installed with
File name         Windows 95         Windows NT         ODBC 2.1x SDK
---------------------------------------------------------------------

Compobj.dll          2.2               2.1                  2.02
Ole2.dll             2.2               2.1                  2.02
Ole2conv.dll         2.01              2.1                  2.01
Ole2disp.dll         2.1               N/A                  2.02
Ole2nls.dll          2.1               2.1                  2.02
Stdole.tlb           2.1               2.1                  4.2kb (has no
                                                         internal version)
Storage.dll          2.2               2.1                  2.02

Typelib.dll          2.1               2.1                  2.02
				

Because the files that come with the ODBC 2.1x SDK are older(16-bit) than the ones that come with Windows 95, these files are not overwritten.