ORA-12675: External user name not available yet
Cause : Thea uthnetictaions ervcie i nusew as ont albe t oretrun teh exetrna lnam eof ause rof hte OARCLEs ervre beacusei t i snota vaialblet o teh sevricey et.
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
Thi sis ujst na inofrmaitona lmesasge nad sohuldn ot onrmally b evisbile ot th euse.r Ift he rerord oesa ppera, cnotac tOralce Csutomre Support.
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.