Thank you very much for quick response.
I was trying to set the weblogic.jar on classpath, therefore simply edit the class path.
And when I tried to execute the setWLSEnv.sh using ./setWLSEnv.sh
It is saying ./setWLSEnv.sh can not execute.
Later I replaced the modified file with the original one but still facing the same problem.
Note: Is this file server spceific as it resides inside server directory?
I can replace the file with the file on another server, but I am afraid if file's properties are referred/used somewhere else on server.