How To Fix GHO_ALLOC_UI001 - Network object header rule already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: GHO_ALLOC_UI - Message Class for UI for Allocation

• Message number: 001

• Message text: Network object header rule 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 GHO_ALLOC_UI001 - Network object header rule already exists ?

  The SAP error message GHO_ALLOC_UI001 with the description "Network object header rule already exists" typically occurs in the context of project management or network planning within SAP, particularly when dealing with network activities and their associated rules.
  
  Cause:
  This error usually arises when you attempt to create or modify a network object (such as a project network or activity) that has a header rule already defined. The system does not allow duplicate header rules for the same network object, which leads to this error message.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Existing Rules: 
  
  Navigate to the relevant network object in SAP and check the existing header rules. You can do this by accessing the network in transaction codes like CN21 (Create Network) or CN22 (Change Network).
  Look for any existing header rules that may conflict with the new rule you are trying to create.
  
  
  
  Modify or Delete Existing Rules:
  
  If you find