A standard function module is overwriting my logic in GGB1.

[walkerist]

I have a specific value of a certain field in BSEG in GGB1 when the document is saved. However, the function module is overwriting the values of that BSEG field. How do I override that function module?

I am having trouble finding the userexit for saving  FB01

[raymond_giuseppi]

Which standard field?

[walkerist]

@raymond_giuseppi BSEG-FDTAG

[jakob_steen-petersen]

You can use a Business Transaction Event in the end of the posting. 

Tcode FIBF

It´s a bit tricky until you get the drill, but basically you wil lhave to find the right BTE, create a Function Module and code it. Create a Product (and activate) and assign the FM to the Product.

[raymond_giuseppi]

AFAIK, there is a technical flag to set to indicate SAP that the user has entered manually the posting date and the cash forecast level indicator (actually the substitution)

• That should prevent SAP to perform standard  cash forecast calculation 
• Look in debug mode how to access xbsez structure in main FI program with some FS assignment (fields such as xfdtag and xfdlev to set to abap_true)

[walkerist]

I'm trying to recalculate the Planning Date