How To Fix IM661 - External number & locked by other user

IM661 - Overview

• Message type: E = Error

• Message class: IM - Maintenance notifications

• Message number: 661

• Message text: External number & locked by other user

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 IM661 - External number & locked by other user ?

  The SAP error message IM661, which states "External number & locked by other user," typically occurs when a user attempts to access or modify an external number range that is currently locked by another user. This can happen in various scenarios, such as when creating or changing documents that require a unique number from an external number range.
  
  Cause:
  
  Concurrent Access: Another user is currently using the external number range, which prevents other users from accessing it simultaneously.
  Number Range Lock: The number range may be locked due to a transaction that is still in progress or has not been properly completed.
  System Configuration: The configuration of the number range may not allow multiple users to access it at the same time.
  
  
  Solution:
  
  Wait and Retry: The simplest solution is to wait for the other user to complete their transaction and then try again.
  Identify the Lock: If you have the necessary authorizations, you can check which