Setting Up Parallel Processing 
Prerequisites
By using parallel processing, you increase the speed of mass processing.
If you want to use parallel processing for mass processing online, you must set up the server group COWORK-DIALOG. If you want to work in the background, set up the server group COWORK-BATCH. These server groups will then be used automatically by the mass processing function.
Procedure

Lock problems can occur as a result of parallel processing (for example, in collective release with availability check).