How To Fix MO424 - Operation not possible for tables with string in the key

MO424 - Overview

• Message type: E = Error

• Message class: MO - Modeling and Prototyping

• Message number: 424

• Message text: Operation not possible for tables with string in the key

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 MO424 - Operation not possible for tables with string in the key ?

  The SAP error message MO424 ("Operation not possible for tables with string in the key") typically occurs when you are trying to perform an operation (like a read, update, or delete) on a database table that has a key field defined as a string (character type) and the operation is not valid for that type of key.
  
  Cause:
  
  Key Field Type: The error is primarily caused by attempting to perform operations on a table where the key field is a string type (CHAR or VARCHAR). Certain operations, especially those that involve range queries or specific types of joins, may not be supported for string keys.
  Data Type Mismatch: If the operation involves comparing or manipulating string keys with non-string types, it can lead to this error.
  Incorrect Logic in ABAP Code: If you are using ABAP code to access the table, there might be logic that is not compatible with the key structure of