Executing function module gives error "Portal request failed: Connection fa

Question

Dear Experts,
I have a Function module  Z_SAT_CREDITLIMIT_CHANGE which in itself accesses the SAP Update Function module
UPDATE/INSERT  of the credit limit(CREDITLIMIT_CHANGE)
and writes the changed data to the Table KNKK(Customer Master Credit Management : Control Area Data).
While executing this fn module Z_SAT_CREDITLIMIT_CHANGE
from VC storyboard i received error "Portal request failed:
Connection failed: Nested Exception: Native Connection to backend system is broken" . Z_SAT_CREDITLIMIT_CHANGE executes fine and updates data in ECC system.
Than i noticed further that while commenting the part of code in Z_SAT_CREDITLIMIT_CHANGEwhere call to fn module CREDITLIMIT_CHANGE is made there's no error recieved and Z_SAT_CREDITLIMIT_CHANGE executes without error but obviously no data is updated.
Appreciate if any one can please explain how can i use CREDITLIMIT_CHANGE  in Z_SAT_CREDITLIMIT_CHANGE
without any errors.
Kind Regards,
Robin.

Answer 1

Hi Robin,
Also, check that the user with the one you're accessing to the backend have permissions to execute the Dataservice at the backend system.
You should check the usermapping to know which is the user at backend.
Best Regards,
Luis