How To Fix APO_BAPI045 - External number assignment: Use order number instead of GUID &1

SAP Error Message - Details

• Message type: E = Error

• Message class: APO_BAPI - Message Class for APO BAPIs

• Message number: 045

• Message text: External number assignment: Use order number instead of GUID &1

What causes this issue?

You have tried to address an order via its GUID although external number
assignment had been chosen and/or no GUID could be chosen.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Check if a flag exists at the used interface with which you can
determine if an order should be addressed via its external or internal
number (for example field EXT_NUMBER_ASSIGNMENT).
Access an order either via its externally assigned number (this does not
apply for SCM local orders) in case the order has an external order
number or change the flag that an order can be accessed via its internal
numbers.
Depending on the used interface it may not be defined to access the
object via its GUID. See documentation to the relevant interface whether
this applies or not. It may be necessary to assign an external number to
the object if it does not already have one.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message APO_BAPI045 - External number assignment: Use order number instead of GUID &1 ?

  The SAP error message APO_BAPI045 indicates that there is an issue with the external number assignment in the Advanced Planning and Optimization (APO) module. Specifically, it suggests that a GUID (Globally Unique Identifier) is being used when the system expects a use order number instead.
  
  Cause:
  
  Incorrect Input: The most common cause of this error is that the system is receiving a GUID instead of a valid use order number. This can happen if the data being passed to the BAPI (Business Application Programming Interface) is not formatted correctly or if the wrong field is being populated.
  Data Mapping Issues: If there is a mapping issue between the source system and SAP, it may lead to GUIDs being sent instead of the expected order numbers.
  
  Configuration Issues: There may be configuration settings in the APO system that are not aligned with the expected data formats.
  
  
  Solution:
  
  Check Input Data: Verify the data being sent to the