Hi Roman,
thanks for clarification and this trace file snippet. I overlooked this and was not aware of that handling. It is absolutely crazy how SAP works around some real simple RMAN core functionality just for using that BR*Tools stuff. Just think about cross-checking these files afterwards and you have some nice inconsistency in the RMAN repository ... not quite sure why SAP adds this stuff to the RMAN (control file) repository at all, because of the compressed datafile copies need to be uncompressed and copied to the sapbackup folder anyway for using some RMAN functionality then 
Thanks again.
Regards
Stefan
