RMAN error

RMAN-05529

RMAN-05529: warning: DB_FILE_NAME_CONVERT resulted in invalid ASM names; names changed to disk group only.

Quick fix

Cause
During DUPLICATE, DB_FILE_NAME_CONVERT produced full ASM file names, which cannot be set by hand. RMAN keeps only the disk group part and lets Oracle Managed Files name the files.
Fix
Nothing needs fixing — it is a warning and the files are created in the target disk group with OMF names. To avoid it, convert only the disk group (e.g. '+DATA/PRIM', '+DATA/STBY') or rely on DB_CREATE_FILE_DEST.

Where it comes up

Related error codes