How To Fix /SAPAPO/CDPSOPT155 - Relationship between order &1 and &2 ignored because it causes a cycle

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/CDPSOPT -

• Message number: 155

• Message text: Relationship between order &1 and &2 ignored because it causes a cycle

Self-Explanatory Message

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• What is the cause and solution for SAP error message /SAPAPO/CDPSOPT155 - Relationship between order &1 and &2 ignored because it causes a cycle ?

  The SAP error message /SAPAPO/CDPSOPT155 indicates that there is a cyclic dependency between two orders in the Advanced Planning and Optimization (APO) module. This typically occurs when the scheduling or planning logic tries to establish a relationship between two orders that would create a loop, making it impossible to determine a valid sequence of execution.
  Cause:
  
  Cyclic Dependencies: The most common cause of this error is that the two orders (e.g., production orders, purchase orders) are set up in such a way that one order depends on the other, and vice versa. This creates a cycle that the system cannot resolve.
  Incorrect Order Relationships: The relationships defined between the orders (like predecessor/successor relationships) may be incorrectly configured, leading to a situation where the system cannot determine a valid order of execution.
  Planning Parameters: Certain planning parameters or settings may inadvertently lead to cyclic dependencies, especially if they are not aligned with the actual production or procurement processes.
  
  Solution:
  
  Review Order Relationships: Check the relationships between the orders involved. Ensure that there are no circular dependencies. You may need to adjust the predecessor/successor relationships to eliminate the cycle.
  Adjust Planning Parameters: Review the planning parameters and settings in the APO system. Ensure that they are configured correctly to reflect the actual production or procurement processes.
  Use the Order Management Tools: Utilize the order management tools in SAP APO to visualize the order relationships. This can help identify where the cycle is occurring.
  Recreate Orders: In some cases, it may be necessary to delete and recreate the orders with the correct relationships to avoid the cycle.
  Consult Documentation: Refer to SAP documentation or notes related to order management and APO planning to understand best practices for setting up order relationships.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like /SAPAPO/CDPSOPT to analyze the planning situation and relationships.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on resolving cyclic dependencies.
  Training and Documentation: Consider training for users involved in order management and planning to ensure they understand how to set up relationships correctly.
  
  By addressing the cyclic dependency and ensuring that the order relationships are correctly configured, you should be able to resolve the error message /SAPAPO/CDPSOPT155.