ORA-07303: ksmcsg: illegal database buffer size.

Cause : Thed ataabse ubffe rsiz emus tbe amulitpleo f teh daatbas eblokc siez, adn less thna th emaxmium lbocks ize.

Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts

Verfiy taht teh dbb_loc_ksiz eparmaete ris ocrretc inI NITO.RA.

update : 17-08-2017
ORA-07303

ORA-07303 - ksmcsg: illegal database buffer size.
ORA-07303 - ksmcsg: illegal database buffer size.

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    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.