RMAN: specification does not match any datafile copy in the repository

We copied one file from production Exadata to standby Exadata:

$ rman target / auxiliary sys@DWH_STB

Recovery Manager: Release 12.1.0.2.0 - Production on Thu Sep 21 14:26:52 2017

connected to target database: SPUR (DBID=496990843)
auxiliary database Password:
connected to auxiliary database: SPUR (DBID=496990843)

RMAN> run
2> {
3> allocate           channel prmy01 type disk PARMS="BLKSIZE=10485760";
4> allocate           channel prmy02 type disk PARMS="BLKSIZE=10485760";
5> allocate auxiliary channel stby01 type disk PARMS="BLKSIZE=10485760";
6> allocate auxiliary channel stby02 type disk PARMS="BLKSIZE=10485760";
7> backup as copy
8> datafile 790 auxiliary format '+RECOC1'
9> datafile 824 auxiliary format '+RECOC1'
10> ;
11> }

using target database control file instead of recovery catalog
allocated channel: prmy01
channel prmy01: SID=3035 device type=DISK

allocated channel: prmy02
channel prmy02: SID=53 device type=DISK

allocated channel: stby01
channel stby01: SID=509 device type=DISK

allocated channel: stby02
channel stby02: SID=762 device type=DISK

Starting backup at 21-09-2017 14:28:07
channel prmy01: starting datafile copy
input datafile file number=00790 name=+DATAC1/SPUR/DATAFILE/p2_proxy_log_2017.1088.937456961
channel prmy02: starting datafile copy
input datafile file number=00824 name=+DATAC1/SPUR/DATAFILE/p2_proxy_log_2017.517.937459103
output file name=+RECOC1/SPURSTB/DATAFILE/p2_proxy_log_2017.980.955290489 tag=TAG20170921T142807
channel prmy02: datafile copy complete, elapsed time: 00:02:45
output file name=+RECOC1/SPURSTB/DATAFILE/p2_proxy_log_2017.701.955290489 tag=TAG20170921T142807
channel prmy01: datafile copy complete, elapsed time: 00:03:15
Finished backup at 21-09-2017 14:31:23
released channel: prmy01
released channel: prmy02
released channel: stby01
released channel: stby02

RMAN> list copy of datafile 790;

specification does not match any datafile copy in the repository

RMAN> list copy of datafile 824;

specification does not match any datafile copy in the repository


Where are these two files ? Why such files are absent ?
Solution: Oracle don't register datafiles copied via auxiliary channels.
So you cannot find these files nether in prod or standby controlfiles.

And therefore you should remove these files manually.