Posting statistical debit item in mass write off process FP04M

Hi,

We have a requirement for which the solution proposed involved posting a statistical debit item during write off process. So we enhanced event 5040 to post item there (called function module ISU_S_FICA_DOC_CREATE).

Now this solution is working fine for single write off process, but for mass process FP04M, we get an error - function modules called in incorrect sequence.

Is this a known problem? Is there any configuration that we may be missing ?

Any help would be appreciated!

Regards,

AM