How To Fix WTADDI255 - Please enter a reference purchase order number for additionals

SAP Error Message - Details

• Message type: E = Error

• Message class: WTADDI - Additionals: Messages

• Message number: 255

• Message text: Please enter a reference purchase order number for additionals

What causes this issue?

To request an additionals IDoc you must specify the purchase order
number of the relevant purchasing document.
A purchase order was generated for the additional. The input parameters
must include the purchasing document number (<zh>AddiBuyHeadID</>) and
the item (<zh>AddiBuyItemNo</>).

System Response

No additionals IDoc is generated.

How to fix this error?

Check the parameters.

Error message extract from SAP system. Copyright SAP SE.