How To Fix MPE_OAN299 - Cross-operation relationship error detected at operation &1, in &2, OA &3

SAP Error Message - Details

• Message type: E = Error

• Message class: MPE_OAN - Operation Activity Network Messages

• Message number: 299

• Message text: Cross-operation relationship error detected at operation &1, in &2, OA &3

What causes this issue?

A cyclical relationship has been defined between operations or operation
activities.
For example, you have two operations, 0010 and 0020 and in each
operation, you have defined operations activities. Then, you defined
relationships stating that OA10 in operation 0020 cannot be started
until OA20 in operation 0010 has been completed. At the same time, you
have defined that OA20 in operation 0010 cannot be started until OA10 in
operation 0020 has been completed. This results in a closed loop
situation whereby none of the operation activities can be started.

System Response

The system issues this error message.

How to fix this error?

Correct your relationships to remove any cyclic dependencies.

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_OAN299 - Cross-operation relationship error detected at operation &1, in &2, OA &3 ?

  The SAP error message MPE_OAN299 indicates a "Cross-operation relationship error" in the context of operations within a maintenance order or production order. This error typically arises when there are inconsistencies or conflicts in the relationships between different operations in the order.
  Cause:
  
  Inconsistent Operation Relationships: The error usually occurs when the relationships between operations (such as dependencies, sequences, or overlaps) are not correctly defined or are conflicting.
  Incorrect Dates or Durations: If the start and finish dates of operations overlap incorrectly or if the durations are not set properly, it can lead to this error.
  Missing or Incorrectly Defined Relationships: If an operation is expected to start after another operation finishes, but the relationship is not defined or is incorrectly defined, this error can occur.
  Changes in Operations: If operations have been modified (added, deleted, or changed) without properly updating the relationships, it can lead to inconsistencies.
  
  Solution:
  
  Check Operation Relationships: Review the operations in the order and ensure that the relationships (predecessors and successors) are correctly defined. Make sure that the sequence of operations is logical and that there are no conflicts.
  Validate Dates and Durations: Ensure that the start and finish dates of each operation are set correctly and that they do not overlap inappropriately. Adjust the dates and durations as necessary.
  Use Transaction Codes: Utilize transaction codes like CO02 (Change Production Order) or IW32 (Change Maintenance Order) to review and modify the operations and their relationships.
  Recreate the Order: If the error persists and cannot be resolved, consider recreating the order from scratch, ensuring that all operations and their relationships are defined correctly from the beginning.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on managing operations and relationships in orders.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common errors.
  Training and Documentation: Ensure that users involved in order management are trained on how to properly define and manage operations and their relationships.
  Support: If the issue cannot be resolved internally, consider reaching out to SAP support for assistance, providing them with the error message details and the context in which it occurred.
  
  By following these steps, you should be able to identify and resolve the cause of the MPE_OAN299 error in your SAP system.