How To Fix CP661 - You have reached the first selected ref op set.

SAP Error Message - Details

• Message type: E = Error

• Message class: CP - Task list messages: Core data

• Message number: 661

• Message text: You have reached the first selected ref op set.

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.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CP661 - You have reached the first selected ref op set. ?

  The SAP error message CP661 ("You have reached the first selected ref op set.") typically occurs in the context of production planning and control, particularly when working with routing or production orders. This message indicates that the system has reached the first operation in a selected reference operation set, and there are no further operations to process.
  Cause:
  
  Reference Operation Set: The error usually arises when the system is trying to navigate through a reference operation set, and it has already reached the first operation. This can happen if the user attempts to move backward or if there are no additional operations defined in the set.
  Routing Configuration: There may be an issue with the routing configuration where the operations are not properly defined or linked.
  User Navigation: The user may be trying to navigate through operations in a way that is not allowed by the system, such as trying to go to a previous operation when already at the first one.
  
  Solution:
  
  Check Routing: Verify the routing for the production order or the material in question. Ensure that all operations are correctly defined and that there are no missing steps.
  Navigation: If you are navigating through operations, ensure that you are not trying to go backward when already at the first operation. Use the appropriate navigation buttons to move forward.
  Reference Operation Set: If you are using a reference operation set, check its configuration to ensure that it contains the expected operations and that they are in the correct sequence.
  SAP Notes: Check for any relevant SAP Notes or updates that may address this specific error message. Sometimes, there are patches or updates that resolve known issues.
  Consult Documentation: Review SAP documentation or help resources related to production planning and routing to understand the expected behavior and configuration.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CA01 (Create Routing), CA02 (Change Routing), and CO01 (Create Production Order) to manage routing and production orders effectively.
  SAP Community: Engage with the SAP Community or forums where other users may have encountered similar issues and can provide insights or solutions.
  Support: If the issue persists, consider reaching out to your SAP support team or consulting with an SAP expert who can provide more tailored assistance based on your specific configuration and usage.
  
  By following these steps, you should be able to address the CP661 error and continue with your production planning activities.