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Getting error while doing RMAN duplicate

in Database Backup and Recovery (MOSC) 1 commentAnswered

channel ch1: reading from backup piece /data4/RMAN/GDC02/level0_202404251300_GDC02_11744_1.rma
channel ch1: ORA-19870: error while restoring backup piece /data4/RMAN/GDC02/level0_202404251300_GDC02_11744_1.rma
ORA-19504: failed to create file "/data4/oradata/GDC02/de_01.dbf"
ORA-27086: unable to lock file - already in use
Linux-x86_64 Error: 11: Resource temporarily unavailable
Additional information: 8
Additional information: 17732

why it is using this /data4/oradata/GDC02/de_01.dbf" location? This is a PROD db "GDC02".

I am using this command:

connect auxiliary /
run {
set until time "to_date('20240425_1424','YYYYMMDD_HH24MISS')";
allocate auxiliary channel ch1 type DISK FORMAT '/data4/RMAN/GDC02/level0_202404251300_%d_%s_%p.rma';

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