How To Fix MPE_OAN320 - Relationship of element &1 in OAN &2, version &3 not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: MPE_OAN - Operation Activity Network Messages

• Message number: 320

• Message text: Relationship of element &1 in OAN &2, version &3 not allowed

What causes this issue?

A relationship was defined that is not allowed.

System Response

The system issues an error for this relationship and will not apply the
changes.

How to fix this error?

Check the following constraints and update the relationships
accordingly. Relationships cannot be created:
-,,In shop floor routings and order-specific shop floor routings that
are non-flexible.
-,,If the target operation activity of an order-specific routing is set
to ?not editable?.
-,,If the target and source are part of the same operation but not part
of the same group.
-,,In cross-operation relationships where the target or source operation
activity is not part of the produce segment.
-,,If the target or source is a group or an event.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MPE_OAN320 - Relationship of element &1 in OAN &2, version &3 not allowed ?

  The SAP error message MPE_OAN320 typically indicates that there is an issue with the relationship of an element in an Object Assignment Number (OAN) within a specific version. This error often arises in the context of managing object assignments, particularly in the areas of project management, asset management, or similar modules where object relationships are defined.
  Cause:
  The error can be caused by several factors, including:
  
  Invalid Relationship Definition: The relationship between the elements defined in the OAN is not valid according to the business rules or configuration settings in the system.
  Versioning Issues: The version specified may not support the relationship being attempted, or the version may be inactive or not properly configured.
  Data Integrity Issues: There may be inconsistencies or missing data in the master data or transactional data that define the relationships.
  Configuration Errors: The configuration settings for object relationships may not be set up correctly in the system.
  
  Solution:
  To resolve the MPE_OAN320 error, you can take the following steps:
  
  
  Check Relationship Definitions: Review the relationship definitions for the elements involved in the OAN. Ensure that the relationships are valid and conform to the expected configurations.
  
  
  Verify Versioning: Ensure that the version specified in the error message is active and correctly configured. If necessary, switch to a different version that supports the desired relationship.
  
  
  Data Validation: Check the master data and transactional data for any inconsistencies or missing information. Ensure that all required fields are populated and that the data adheres to the expected formats.
  
  
  Review Configuration Settings: If you have access to the configuration settings, review the settings related to object relationships. Make sure that they are set up correctly and that there are no restrictions that would prevent the relationship from being established.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on the error message and the context in which it occurs. This may provide additional insights into the cause and potential solutions.
  
  
  Seek Support: If the issue persists after trying the above steps, consider reaching out to your SAP support team or consulting with an SAP expert who can provide more tailored assistance based on your specific system configuration and business processes.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error message or provide patches or updates that could resolve the issue.
  Transaction Codes: Familiarize yourself with relevant transaction codes that may help in troubleshooting or managing object assignments, such as OAN-related transactions.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify the root cause of the MPE_OAN320 error and implement an appropriate solution.