Check on SAP the /SAS/DESTS table and see if there are any destinations that remain in use even when there are no SAS sessions running.   Also check to see if there is an RFC process sitting in a "Waiting" state on BW (RFC.SAS6 in your case). this can be removed using the "delete client" option. - See example below where RFC.SAS3 is giving a similar error to the one you're experiencing.     ... View more