How To Fix MO431 - Choose at least one key field

SAP Error Message - Details

• Message type: E = Error

• Message class: MO - Modeling and Prototyping

• Message number: 431

• Message text: Choose at least one key field

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 MO431 - Choose at least one key field ?

  The SAP error message MO431 ("Choose at least one key field") typically occurs in the context of production planning or material management when a user attempts to execute a transaction that requires specific key fields to be selected, but none have been chosen. This can happen in various scenarios, such as when creating or processing production orders, material documents, or other related activities.
  
  Cause:
  The error is triggered when the system expects the user to select at least one key field (such as a material number, order number, or plant) to proceed with the operation. If no key fields are selected, the system cannot determine which data to process, leading to this error message.
  
  Solution:
  To resolve the MO431 error, follow these steps:
  
  
  Identify Required Key Fields: Review the transaction you are trying to execute and identify which key fields are mandatory. This information can often be found in the documentation for the transaction or