If Kerberos support is provided by the Microsoft Windows Security Support Provider Interface (SSPI), edit the csfkrb5 entry in the libtcl.cfg file to specify the libsspiwrapper.dll as the GSS library.
For example:
csfkrb5=LIBSKRB secbase=@REALM libgss=C:\sybase\OCS-15_0\lib3p\libsspiwrapper.dll