How To Fix W#129 - Scheduling conflict between document & and document category &

SAP Error Message - Details

• Message type: E = Error

• Message class: W# -

• Message number: 129

• Message text: Scheduling conflict between document & and document category &

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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Smart SAP Assistant

• What is the cause and solution for SAP error message W#129 - Scheduling conflict between document & and document category & ?

  The SAP error message W#129 indicates a scheduling conflict between two documents, typically in the context of production planning or project management. This error arises when there are overlapping or conflicting scheduling parameters for the documents involved, such as production orders, maintenance orders, or project tasks.
  Cause:
  
  Overlapping Dates: The start and end dates of the two documents overlap, causing a conflict in scheduling.
  Resource Allocation: The same resources (machines, labor, etc.) are allocated to both documents at the same time, leading to a conflict.
  Document Categories: The documents belong to different categories that have specific scheduling rules or constraints that are incompatible with each other.
  Capacity Constraints: The system may have capacity constraints set up that prevent the scheduling of both documents simultaneously.
  
  Solution:
  
  Review Document Dates: Check the start and end dates of the conflicting documents. Adjust the dates to eliminate the overlap.
  Resource Reallocation: If the conflict is due to resource allocation, consider reallocating resources to ensure that they are not scheduled for multiple tasks at the same time.
  Change Document Categories: If applicable, review the document categories and their scheduling rules. You may need to change the category of one of the documents to resolve the conflict.
  Adjust Capacity Settings: Review the capacity settings in the system to ensure that they allow for the scheduling of both documents. You may need to increase capacity or adjust the scheduling parameters.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on resolving scheduling conflicts related to the document types you are working with.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like CO02 (Change Production Order), CJ20N (Project Builder), or IW32 (Change Order) to review and modify the documents.
  SAP Notes: Check SAP Notes for any known issues or patches related to scheduling conflicts.
  User Exits and BAdIs: If the scheduling conflict is due to custom logic, consider reviewing any user exits or Business Add-Ins (BAdIs) that may be affecting scheduling behavior.
  Testing: After making adjustments, test the changes in a development or quality assurance environment before applying them in production.
  
  By following these steps, you should be able to identify the cause of the scheduling conflict and implement a solution to resolve the W#129 error in SAP.