Just taking a quick guess.
Have a liik at /apps/syb1502/OCS-15_0/scripts/lnsyblibs
As of SDK 15.0 and Open Server 15.0, Sybase library names have
changed from lib<name> to libsyb<name> to avoid name clashes
with other libraries.
To allow pre-15.0 applications to continue to work with the
renamed shared libraries, this script is provided to create
symbolic links from the new library names to the old ones in