AseGacUtility /u DLL_Name
Or
AseGacUtility4 /i DLL_Name
For example where
DLL_Name is the DLL you want to remove from the GAC.
For example, to remove 32-bit version of
Sybase.AdoNet2.AseClient.dll from the GAC,
run:
AseGacUtility /u
C:\Sybase\DataAccess\ADONET\dll\Sybase.AdoNet2.AseClient.dll
For example, to remove 64-bit version of
Sybase.AdoNet4.AseClient.dll from the GAC,
run:
AseGacUtility /u
C:\Sybase\DataAccess64\ADONET\dll\Sybase.AdoNet4.AseClient.dll