How To Fix SY261 - The ab_gl.tmatrixh line header array already exists

SY261 - Overview

• Message type: E = Error

• Message class: SY - ABAP/4 system messages

• Message number: 261

• Message text: The ab_gl.tmatrixh line header array already exists

Self-Explanatory Message

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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 SY261 - The ab_gl.tmatrixh line header array already exists ?

  The SAP error message SY261, which states "The ab_gl.tmatrixh line header array already exists," typically occurs in the context of ABAP programming, particularly when dealing with internal tables and their headers. This error indicates that there is an attempt to create or manipulate an internal table header that has already been defined or initialized.
  
  Cause:
  
  Duplicate Declaration: The error often arises when there is an attempt to declare or initialize an internal table or its header more than once in the same scope.
  Improper Use of APPEND or INSERT: If you are trying to append or insert data into an internal table that has not been properly initialized or has already been initialized, this error can occur.
  Scope Issues: If the internal table is declared in a broader scope (like a global or module level) and then attempted to be re-declared in a local scope, it can lead to this error.
  
  
  Solution:
  
  
  Check Declarations: Review your