Intercompany billing (IGA) account assignment

[vdham]

Dear community,

We are getting errors when processing IC Credit memo invoices. The IDOC that is creating the posting on account 59900000 (COGS affiliated) is missing the account assignment. The account assignment should be flexible based on original sales document (not fixed from CBC default account assignment).

For example: 

Message monitoring error due to account assignment.

IDOC data does show the original Profit center (from the IC credit memo); based on that we want to set the correct account assignment for the COGS (affiliated) posting:

Flow is working for regular IC invoices, not for credit memo's. 
In on premise we could affect this process using transaction VOFC.
Anyone had same issue and found a solution for this?

We tried custom logic, substituion for journal entries, dynamic account determination but all keep giving same error. 

Substitution (not working/riggered)

CBC Default account assignment:

Custom logic is not triggered upon processing IDOCs, custom logic flow is empty. 

Thanks for any suggestions.

Kind regards, Koen