How To Fix MJ022 - Field & cannot be influenced by itself

SAP Error Message - Details

• Message type: E = Error

• Message class: MJ - Field Selection

• Message number: 022

• Message text: Field & cannot be influenced by itself

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 MJ022 - Field & cannot be influenced by itself ?

  The SAP error message MJ022, which states "Field & cannot be influenced by itself," typically occurs in the context of the SAP system when there is a circular dependency in the configuration of fields in a particular transaction or process. This error is often seen in the context of Material Management (MM) or Production Planning (PP) modules, particularly when dealing with material master data or production orders.
  Cause:
  The error arises when a field is set to influence itself, creating a circular reference. For example, if you have a field that is supposed to derive its value based on another field, but that other field is also set to derive its value from the first field, it creates a loop that the system cannot resolve.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review Field Dependencies: Check the configuration of the fields involved in the transaction or process. Look for any circular dependencies where one field is set to influence another, which in turn influences the first field.
  
  
  Adjust Field Settings: Modify the settings of the fields to eliminate the circular reference. Ensure that each field influences or is influenced by other fields in a linear manner, without any loops.
  
  
  Check Custom Logic: If there is any custom logic (e.g., user exits, BAdIs, or custom programs) that manipulates these fields, review that code to ensure it does not create circular dependencies.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for the specific transaction or module you are working with. There may be specific guidelines or best practices for configuring the fields.
  
  
  Testing: After making changes, test the transaction or process again to ensure that the error is resolved and that the fields are functioning as expected.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  Transaction Codes: Familiarize yourself with relevant transaction codes that may help in diagnosing or configuring the fields, such as MM01 (Create Material), MM02 (Change Material), or others depending on your context.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed. Other users may have encountered the same error and can provide insights or solutions.
  
  If the problem persists after following these steps, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.