Incorrect function module IDOC_INPUT_DEBITOR called up

Hi,

I have tried idoc DEBMDM04 but getting error "Incorrect function module IDOC_INPUT_DEBITOR called up".

I have checked in we42 and we57 " IDOC_INPUT_DEBITOR" function module has assigned in both.Please assist

for the issue.

Idoc type: DEBMDM04(Customer + Address)

Msg type: DEBMDM

Process code:DEBM

Function module:IDOC_INPUT_DEBITOR

Thanks

Bala