If upgrading from Adaptive Server 12.5:
setenv OLDSYBASE <old_$SYBASE_directory>
setenv OLDSYBASE_ASE ASE-12_5
This is required if you are using the
sqlupgraderes utility
to perform your upgrade.
Sybase recommends you
also set the OLDSYBASE, and OLDSYBASE_OCS environment variables
to point to the old installation of Adaptive Server, so the upgrade utility automatically populates input fields
with the correct information as you upgrade.