ASMCMD> cp /tmp/ata01.dbf +DATAC1/EBSMG1T/datacopy

ASMCMD-8012: cannot determine file type for file

ORA-15056: additional error message

ORA-15312: invalid file type

ORA-06512: at "SYS.X$DBMS_DISKGROUP", line 322

ORA-06512: at line 3 (DBD ERROR: OCIStmtExecute)