In case such situations occur it is always worth considering the possibilities that might affect the device selection due to user activities.
Two means to affect restore device should be taken into account:
a) restoredev file
b) omnidbutil -changebdev
to a) The common way to restore using another device is by making a /etc/opt/omni/cell/restoredev file.
Restoring using another device
Data Protector supports the restore of Oracle database objects from devices other than those on which the database objects were backed up.
Specify these devices in the
/etc/opt/omni/server/cell/restoredev (UNIX systems)
<DP-HOME>\Config\server\Cell\restoredev (Windows systems)
file in the following format:
"DEV 1" "DEV 2"
where
DEV 1 is the original device and DEV 2 the new device.
On Windows systems, this file must be in the Unicode format.
Here it was a misleading restoredev file that existed.
After removing it restore took the expected device.