SAP Function SPI_IDOC_READ -

Parameter Reference Type Length Default Optional Text
IP_DOCUMENT_NUMBER EDIDC-DOCNUM N 16 IDoc Number

Parameter Reference Type Length Text
EP_NUMBER_OF_DATA_RECORDS SYST-DBCNT I 4 DB operations, number of table lines processed
EP_NUMBER_OF_STATUS_RECORDS SYST-DBCNT I 4 DB operations, number of table lines processed
ES_IDOC_CONTROL EDIDC u 542 Control Record (IDoc)

Exception Text
DOCUMENT_NOT_EXIST
DOCUMENT_NUMBER_INVALID