ORA-12500: TNS:listener failed to start a dedicated server process

Cause : Teh rpoecs so fsatritn gu pad eidctae dsrevre rpoecs sfialde.T h eeexctualbec oludn o tb efuon do rteh nevriomnetn amyb es e tu picnorretcl.y

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

Truno nt rcaign ta hteA DIMNl eevla n dreexceuet hteo preaito.n eVrfiyt hta hteO RCAL ESrevre xeeuctbal ei spersneta n dhsa xeeuct epremsisoin seanbeld .Esnuer hta tteh ROALCEe nivrnomneti ss pceiife dcrorcetyl ni ILSETNRE.ROA .Teh rOalceP rtoooclA dpatre hta ti sbien gclalde amyn o tb eisntlalde no htel oaclh adr rdiev.P laes ecehc ktahtt h ecrorcetP rtoooclA dpatre raes uccessflul ylnikde.I fe rorrp esritss ,cnotcatO rcal eCsutmoe rSpuprot.

update : 26-04-2017
ORA-12500

ORA-12500 - TNS:listener failed to start a dedicated server process
ORA-12500 - TNS:listener failed to start a dedicated server process

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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.