Event Based Alert Error

Hi

Anyone have an idea about the error mentioned below? Why ROWID is coming as Zero?

Following is the log from Alert Concurrent Request.

*************************************************************************
Performing alert "On Receipt"
Connecting to "APPS (124)"
  Performing action set "SEND_ALERT_SET"
SQL error ORA-01410: invalid ROWID
occurred while executing the user-defined SQL statement for this alert (STMT=SELECT poh.segment1, pol.line_num, rcvsh.receipt_num FROM po_headers_all poh,
       po_lines_all pol,
       po_distributions_all pod,
       rcv_transactions rcvt,
       rcv_shipment_headers rcvsh
WHERE poh.po_header_id = pod.po_header_id
   AND poh.po_header_id = pol.po_header_id