How To Fix U9521 - Routing does not exist for successor activity

SAP Error Message - Details

• Message type: E = Error

• Message class: U9 - Message Class for Output in Application Log

• Message number: 521

• Message text: Routing does not exist for successor activity

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message U9521 - Routing does not exist for successor activity ?

  The SAP error message U9521, "Routing does not exist for successor activity," typically occurs in the context of production planning and control, particularly when dealing with production orders, routing, or work center activities. This error indicates that the system cannot find a valid routing for the specified successor activity in the production process.
  Cause:
  
  Missing Routing: The most common cause is that the routing for the successor activity has not been defined in the system.
  Incorrect Configuration: The routing may exist, but it is not correctly configured or linked to the relevant material or production order.
  Activity Sequence Issues: The sequence of activities in the routing may not be properly defined, leading to a situation where the system cannot find the next step.
  Material Master Issues: The material master data may not be correctly set up, which can affect the routing.
  Versioning Issues: If there are multiple versions of the routing, the system may be referencing an outdated or incorrect version.
  
  Solution:
  
  Check Routing: Verify that the routing for the successor activity exists in the system. You can do this by navigating to the routing transaction (e.g., CA03) and checking the relevant routing for the material.
  Create or Update Routing: If the routing does not exist, you may need to create it using transaction CA01 (Create Routing) or update it using CA02 (Change Routing).
  Check Activity Sequence: Ensure that the activities in the routing are correctly sequenced and that the successor activity is properly defined.
  Review Material Master: Check the material master data to ensure that it is correctly linked to the routing. You can do this using transaction MM03 (Display Material).
  Check for Versioning: If there are multiple versions of the routing, ensure that the correct version is being used in the production order.
  Consult Documentation: Review any relevant documentation or guidelines for your specific SAP implementation, as there may be custom configurations or processes in place.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CA03 (Display Routing), CA01 (Create Routing), CA02 (Change Routing), and MM03 (Display Material).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Authorization: Ensure that you have the necessary authorizations to view and modify routings and material master data.
  Consult with Colleagues: If you are unsure about the routing or configuration, consult with colleagues or a SAP specialist within your organization.
  
  By following these steps, you should be able to identify the cause of the U9521 error and implement the necessary solutions to resolve it.