How To Fix RU121 - Activity & is not defined (confirmation is not possible)

SAP Error Message - Details

• Message type: E = Error

• Message class: RU - Messages for order completion confirmation

• Message number: 121

• Message text: Activity & is not defined (confirmation is not possible)

What causes this issue?

The work center does not have a standard value for the activity that
you have entered. Consequently, the standard value cannot be confirmed.

How to fix this error?

To confirm the activity you must first define a corresponding standard
value in the work center.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RU121 - Activity & is not defined (confirmation is not possible) ?

  The SAP error message RU121 ("Activity & is not defined (confirmation is not possible)") typically occurs in the context of production order confirmations or when trying to confirm activities in a production environment. This error indicates that the system cannot find the specified activity in the relevant configuration, which prevents the confirmation process from proceeding.
  Causes:
  
  Missing Activity Definition: The activity you are trying to confirm has not been defined in the system. This could be due to incorrect configuration or missing entries in the relevant tables.
  Incorrect Order Type: The order type you are working with may not be set up to allow for the specific activity.
  Authorization Issues: The user may not have the necessary authorizations to confirm the activity.
  Incorrect Production Version: The production version associated with the order may not include the activity you are trying to confirm.
  Master Data Issues: There may be issues with the master data related to the work center, routing, or production order.
  
  Solutions:
  
  
  Check Activity Definition:
  
  Go to the configuration settings in SAP (Transaction code: OPL8 or similar) and verify that the activity is defined for the relevant work center and routing.
  Ensure that the activity is correctly assigned to the production version.
  
  
  
  Review Order Type Configuration:
  
  Check the configuration for the order type being used to ensure that it allows for the confirmation of the specified activity.
  
  
  
  User Authorizations:
  
  Verify that the user has the necessary authorizations to perform confirmations for the specified activity. This can be checked with the help of your SAP security team.
  
  
  
  Check Production Version:
  
  Ensure that the production version associated with the production order includes the activity you are trying to confirm. You can check this in the material master or production order details.
  
  
  
  Master Data Review:
  
  Review the master data for the work center and routing to ensure that all necessary activities are defined and correctly linked.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide additional troubleshooting steps.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CO11N (for confirmations), CO01 (for creating production orders), and OPL8 (for activity type configuration).
  Documentation: Review SAP documentation related to production order confirmations and activity types for more detailed guidance.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the root cause of the RU121 error and implement the necessary solutions to resolve it.