How To Fix AO524 - Entering app.request number only possible with external number assignment

AO524 - Overview

• Message type: E = Error

• Message class: AO - Appropriation requests - Master data / Customizing

• Message number: 524

• Message text: Entering app.request number only possible with external number assignment

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message AO524 - Entering app.request number only possible with external number assignment ?

  The SAP error message AO524 ("Entering app.request number only possible with external number assignment") typically occurs when you are trying to enter an application request number manually in a transaction that requires the use of an external number assignment. This is common in various SAP modules, particularly in the context of transport requests or change requests.
  
  Cause:
  The error arises because the system is configured to use internal number assignment for application requests, but you are attempting to enter a request number manually. In SAP, there are two types of number assignments:
  
  Internal Number Assignment: The system automatically generates the request number.
  External Number Assignment: The user can manually enter the request number.
  
  If the system is set to internal number assignment, you cannot manually enter a request number, which leads to this error.
  
  Solution:
  To resolve the AO524 error, you can take the following steps:
  
  
  Check Number Assignment Configuration:
  
  Go to the transaction code SE03 (Transport Organizer Tools).
  Navigate