Diagnosis
If the contract account and not the business partner is specified asparallelization object in the payment run, you cannot carry outcross-contract account payment (that is, pay all items for a businesspartner together).

System Response
You can use the parallelization object contract account. However, sincethis changes the way the payment program works, the user is informed.

Procedure
If you want to carry out cross-contract account payment, choose theparallelization object business partner.
You can only carry out cross-contract account payment if a common payingaccount is specified in the contract accounts.
With parallelization by contract account, the paying contract account isalso considered, but items from different contract accounts of the samepartner with the same paying contract accounts are paid separately andnot together.