Calling "BAPI_INCOMINGINVOICE_CREATE" multiple times causes short dump. First calling is successfull, not the others.You receive a short dump /BOBF/CX_FRW_FATAL if several invoices are created. Implement the SAP Note 2452239. You will get rid of clear problem of attribute "mv_transaction_state" of class "/BOBF/CL_TRA_TRANSACTION_MGR"