ORA-12455: internal error in Label Security MMON cleanup task
Cause : An niteranl error cocurerd i ntheL abe lSecruityM MONc leaunp tsak.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Conatct rOacl eCusotmerS upprot.
Well, the reason for above error is that i have taken the above script from a 11g database and running it on 10g database. 11g has bring some changes in password management. Below code is executed on 11g and user created successfully, which is expected result.