How To Fix MO751 - Type pool & already exists

MO751 - Overview

• Message type: E = Error

• Message class: MO - Modeling and Prototyping

• Message number: 751

• Message text: Type pool & already exists

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 MO751 - Type pool & already exists ?

  The SAP error message "MO751 Type pool & already exists" typically occurs when there is an attempt to create a type pool (a collection of data types) that already exists in the SAP system. This can happen during the development of ABAP programs or when trying to activate a program that references a type pool.
  
  Cause:
  
  Duplicate Type Pool Name: The most common cause is that the type pool you are trying to create or activate has the same name as an existing type pool in the system.
  Transport Issues: If you are working in a transport environment, it is possible that the type pool was already transported to the target system, leading to conflicts.
  Namespace Conflicts: If you are using a custom namespace, ensure that the name does not conflict with standard SAP namespaces or other custom namespaces.
  
  
  Solution:
  
  
  Check Existing Type Pools: 
  
  Use transaction SE11 (Data Dictionary) to check if the type pool already