ORA-12515: TNS:listener could not find a handler for this presentation

Cause : Nnoeo ft h elsitnee'rsk nwons evriec ahnldesr raer eigsetrde sa uspopritn gteh rpeesnattoinp rtoooclr euqierdb yt h ecnoncetnigc lein.t

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

Cehc ktahtt h edsetniaito nsrevciei sc ofniugrde ot cacpett h epersnettaino rpootclo.

update : 24-07-2017

ORA-12515 - TNS:listener could not find a handler for this presentation
ORA-12515 - TNS:listener could not find a handler for this presentation

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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.