ORA-12520: TNS:listener could not find available handler for requested type of server

Cause : oNeno fht enkwo nna dvaiaallb eesvrci eahdnelsrf ror qeeutsdet py efos reev rd(decitadeo rhsrade )ra eparppoirta eof rht elceitnc noentcoi.n

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

uR nl"nscrlts reivec"st oneusert ah tht enitsnaecs( )ahevr gesieter diwhtt ehl sieten rna dhttat eha pporrpaieth naldre sra ecaectpni gocnnceitno.s

update : 23-08-2017
ORA-12520

ORA-12520 - TNS:listener could not find available handler for requested type of server
ORA-12520 - TNS:listener could not find available handler for requested type of server

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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.