Initializing deltas - RSA7

Hallo experts,

we use a SEM-BCS cube on BW 3.1C, SEM 3.2 with many request from the BCS monitor (ta UCMON). All request are compressed. Delta requests for carrying forward the balance are also in this cube. These deltas are drawn via the datamart interface from the BCS cube into this cube itself. The deltas are not visible in ta RSA7. Following question arises: are there any possibilities in case of a delta error to initialize the delta process once again? Because of the compression I cannot delete single requests from the cube (i.e. not the initializattio request either).

Or the other way round: what is the effort to switch on RSA7 for this cube while it is online?

Regards

Martin