From what I see, you are connecting successfuly to the recovery catalog, as well as the Auxiliary instance (CVTEST) but are failing to connect to the target (source DB) due to a TNS error. If you log on to the auxiliary server, can you connect to the source (target) database?
Try this from command line, start an rman session, then issue the following commands:
RMAN> connect catalog account/password@catalog
RMAN> connect auxiliary account/password@CVTEST
RMAN> connect sys/password@targetdb
I'll bet that the third connect fails with the same TNS error. Make sure that the tnsnames.ora on the auxilary server contains the appropriate entries to resolve the target database on the source server.
Let us know how you make out.
Ernst F. Graeler
Senior Technical Lead/Analyst