Delivery schedule change output type

Hi all,

we are using EDI to send PO or delivery schedule (LP) to vendor.

condition record and partner profile is maintained. Create message for delivery schedule is working fine, but when i change the deliveyr schedule, output message is triggered but it failed.

the error is. please help me on this. For po change it is working fine only issue with delivery schedule.

No IDoc items belonging to purchasing document found

Message no. ME760

Diagnosis

• Outbound processing:
  No IDoc has been generated because no output-relevant changes to the document were found.

• Inbound verarbeitung:
  No items were found for the PO number specified in the IDoc. The IDoc may be incomplete (contains no items).