Verify the name and location of the runserver file. Be sure the runserver file for your current server is located in:
$SYBASE/install directory for versions 11.5.x and 11.9.x
Verify that the file is still named RUN_servername, where servername is the name of the old server. The servername must appear exactly as it appears in the interfaces file.The RUN_servername file for a server SYBASE is called RUN_SYBASE. If the RUN_servername file for your current Adaptive Server is named, you must change the name during the upgrade process.