Not able to change the SCB indicator field in the invoice document

Hi All,

In transaction F110 we generated vendor payments. The payment run was ok. But DME was not generated. With the error message:

SCB indicator is missing or is not valid

No DME could be generated for the following documents

...

So we want to reverse the payment document, add the SCB indicator into the invoice document and do the payment run again. But, we were NOT able to add the SCB indicator (FBL1N -> invoice document -> Additional Data: SCB field is grey!).

The thing is strange: We had this same problem with another vendor in another company code. And we were able to fill the SCB field and everything was then ok.

Do you know what makes this difference?

It has nothing to do with user authorisation (tested with SAP_ALL).

It has nothing to do with field status group and so on, because it's the same for these 2 vendors...

Thank you very much in advance for any clue and help.

Regards

Christina