How To Fix /SAPAPO/CTM1330 - Incorrect reference type; only end-start relationship is possible

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/CTM1 -

• Message number: 330

• Message text: Incorrect reference type; only end-start relationship is possible

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/CTM1330 - Incorrect reference type; only end-start relationship is possible ?

  The SAP error message /SAPAPO/CTM1330 Incorrect reference type; only end-start relationship is possible typically occurs in the context of SAP Advanced Planning and Optimization (APO), particularly when dealing with the Capacity Planning or CTM (Capable-to-Match) functionalities. This error indicates that there is an issue with the way relationships between activities or operations are defined in the planning process.
  Cause:
  The error is caused by an incorrect configuration of the relationships between operations in a production or planning scenario. Specifically, it indicates that the system is expecting a specific type of relationship (end-start) between two activities, but the defined relationship does not meet this requirement. This can happen due to:
  
  Incorrectly Defined Relationships: The relationships between operations may have been defined incorrectly in the planning data.
  Incompatible Relationship Types: The system may be trying to process a relationship type that is not supported in the context of the operation being planned.
  Data Integrity Issues: There may be inconsistencies or errors in the master data or planning data that lead to this error.
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Relationship Definitions:
  
  Go to the relevant planning book or transaction where the relationships are defined.
  Verify that the relationships between operations are correctly defined as end-start relationships. This means that the end of one operation should be the start of the next operation.
  
  
  
  Adjust Planning Data:
  
  If you find any incorrect relationships, adjust them to ensure they conform to the end-start requirement.
  Ensure that the operations are sequenced correctly and that there are no gaps or overlaps that would violate the end-start relationship.
  
  
  
  Review Master Data:
  
  Check the master data for the materials and resources involved in the planning process. Ensure that all relevant data is complete and accurate.
  Look for any inconsistencies in the routing or production versions that might affect the relationships.
  
  
  
  Test Changes:
  
  After making adjustments, re-run the planning process to see if the error persists.
  Monitor the logs for any additional errors or warnings that may provide further insight.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for more detailed information on relationship types and their configurations in APO.
  
  
  
  Seek Support:
  
  If the issue persists after checking the above points, consider reaching out to your SAP support team or consulting with an SAP expert who specializes in APO.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as /SAPAPO/CTM for CTM settings and /SAPAPO/RRP3 for planning board analysis.
  SAP Notes: Check for any SAP Notes related to this error message for potential patches or updates that may address known issues.
  Training and Documentation: Consider training resources or documentation on SAP APO to better understand the configuration of relationships and planning processes.
  
  By following these steps, you should be able to identify and correct the cause of the error message /SAPAPO/CTM1330.