How To Fix /SAPAPO/CDPSOPT236 - Predecessor for activity &2 in locked activity chain &1 is not valid

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/CDPSOPT -

• Message number: 236

• Message text: Predecessor for activity &2 in locked activity chain &1 is not valid

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/CDPSOPT236 - Predecessor for activity &2 in locked activity chain &1 is not valid ?

  The SAP error message /SAPAPO/CDPSOPT236 indicates that there is an issue with the predecessor activity in a locked activity chain within the SAP Advanced Planning and Optimization (APO) module. Specifically, it means that the predecessor for the specified activity is not valid, which can occur for several reasons.
  Causes:
  
  Locked Activity Chain: The activity chain is locked, which means that no changes can be made to it. This can happen if another user or process is currently working on it.
  Invalid Predecessor: The predecessor activity specified does not exist or is not valid in the context of the current activity chain.
  Data Inconsistency: There may be inconsistencies in the data related to the activity chain, such as missing or incorrect entries in the master data.
  Configuration Issues: There may be configuration issues in the APO system that prevent the predecessor from being recognized as valid.
  
  Solutions:
  
  Check Activity Chain Lock: Verify if the activity chain is indeed locked. If it is, you may need to wait until the lock is released or contact the user who has locked it to make necessary changes.
  Validate Predecessor: Check the predecessor activity to ensure it exists and is correctly defined in the system. You can do this by navigating to the relevant planning book or activity chain and reviewing the settings.
  Review Data Consistency: Ensure that all relevant master data (like resources, activities, and their relationships) is correctly maintained and consistent. You may need to run consistency checks or data validation reports.
  Check Configuration: Review the configuration settings in the APO system to ensure that they are set up correctly for the activity chains and their predecessors.
  Consult Documentation: Refer to SAP documentation or notes related to this error message for any specific guidance or patches that may address the issue.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like /SAPAPO/SDP94 (for planning book) or /SAPAPO/CDPS (for activity chains) to investigate further.
  SAP Notes: Check for any relevant SAP Notes that might provide additional insights or solutions for this specific error.
  User Authorization: Ensure that you have the necessary authorizations to view and modify the activity chains and their predecessors.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or APO support team for further assistance.