The original sybase client version is 18.104.22.168. Connection was working fine until there was a request to install client version 12.5.2. To try to correct, deinstalled 12.5.2, still not working...reinstalled 22.214.171.124, still not working. Connection via isql is working fine despite the reinstallation. Trace although enabled, was not generating a trace file during the connection process. Event Viewer Logs do not register any clues as well. What could be done to trace what's going on? Thanks.