ORA-30155: An I/O Error occured during an OCIFile function call
Cause : An I/ Oerroro ccurrde at teh systme leve.l
Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts
This si a sytsem erorr andt he aciton will depn don th eerror.
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.