SAP Message >3744 - Collective bill &1 will not be written off

Diagnosis
The collective bill cannot be written off in a mass run. Items fordifferent business partners or contract accounts can be combined in acollective bill. The possibilitiy of parallel processing in a mass runcan result in lock problems.

System Response
The collective bill is not written off at the level of the collectivebill.

Procedure
The items that belong to a collective bill are written off in a mass runwhen these items are selected as line items.