How To Fix PQ653 - Cannot create relationship (period conflict)

SAP Error Message - Details

• Message type: E = Error

• Message class: PQ - HR-PD: Personnel Development

• Message number: 653

• Message text: Cannot create relationship (period conflict)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message PQ653 - Cannot create relationship (period conflict) ?

  The SAP error message PQ653 "Cannot create relationship (period conflict)" typically occurs in the context of Production Planning and Control (PP) or Project System (PS) modules when there is an attempt to create a relationship between two activities or operations that have conflicting time periods. This can happen in scenarios such as scheduling, where the start and finish dates of the activities do not align properly.
  Cause:
  
  Overlapping Dates: The start and finish dates of the two activities or operations you are trying to link may overlap in a way that is not allowed by the system.
  Incorrect Time Settings: The time settings for the activities may not be configured correctly, leading to conflicts.
  Missing or Incorrect Data: There may be missing or incorrect data in the master data (like work centers, routing, etc.) that affects the scheduling of the activities.
  Resource Availability: If the resources required for the activities are not available during the specified time periods, it can lead to conflicts.
  
  Solution:
  
  Check Activity Dates: Review the start and finish dates of the activities you are trying to link. Ensure that they do not overlap in a way that violates the scheduling rules.
  Adjust Scheduling Parameters: Modify the scheduling parameters for the activities to ensure they align correctly. This may involve changing the duration or start/finish dates.
  Review Master Data: Ensure that all relevant master data (like work centers, routing, etc.) is correctly set up and that there are no discrepancies.
  Resource Allocation: Check the availability of resources and ensure that they are allocated correctly to the activities.
  Use Alternative Relationships: If the relationship you are trying to create is not feasible, consider using alternative relationships or adjusting the sequence of operations.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like C202 (Change Activity) or C203 (Display Activity) to review and modify the activities.
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to this error message.
  Documentation: Refer to SAP documentation for Production Planning or Project System for detailed guidelines on scheduling and relationships between activities.
  Testing: After making changes, test the scheduling again to ensure that the error does not reoccur.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in the relevant module.