System Copy - unable to create control file...

Dear All,

After copying all the data files when I am trying to create a control file..it is getting created with .ctl extenstion.

controlfile/o1_mf_bxk3pysy_.ctl Iam unable to find .dbf control files after @control.sql command. Please assist.

Location where the control file is getting created - /oracle/RP1/oracleflash/SID/controlfile..

I am I missing any thing..why the .dbf control file is not getting created

Regards,
letz..