I am using the function module 'IDOC_INPUT_INVOIC_MRM' to do some Tax calculation for the invoice documents before posting thro EDI . I am using WE19 trax for this process. Currently the document is getting posted after this process getting executed , but i want to park this document . I am trying to use 'BAPI_INCOMING_INVOICE_PARK' thro WE19 tranx , but the system giving error this function module can't be used inside this trax. Can any one pls explain How to park the invoice thro EDI ?