How To Fix /SAPAPO/MC01138 - Variable identifier '&' already assigned

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/MC01 -

• Message number: 138

• Message text: Variable identifier '&' already assigned

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/MC01138 - Variable identifier '&' already assigned ?

  The SAP error message /SAPAPO/MC01138 Variable identifier '&' already assigned typically occurs in the context of SAP Advanced Planning and Optimization (APO) when there is an issue with variable identifiers in the planning area or planning book. This error indicates that a variable identifier (represented by &) has already been assigned to another object or variable, leading to a conflict.
  Cause:
  
  Duplicate Variable Assignment: The variable identifier you are trying to use has already been assigned to another variable or object within the same planning area or planning book.
  Configuration Issues: There may be issues in the configuration of the planning area or planning book where the same variable is being referenced multiple times.
  Data Consistency Issues: If there have been recent changes to the planning area or planning book, inconsistencies may arise, leading to this error.
  
  Solution:
  
  Check Variable Assignments: Review the variable assignments in the planning area or planning book to ensure that the variable identifier is not already in use. You can do this by navigating to the relevant configuration settings in SAP APO.
  Rename or Reassign Variables: If you find that the variable identifier is indeed already assigned, consider renaming or reassigning the variable to avoid the conflict.
  Delete Unused Variables: If there are variables that are no longer needed, you can delete them to free up the identifier for new assignments.
  Consistency Check: Perform a consistency check on the planning area or planning book to identify any other potential issues that may be causing the error.
  Transport Requests: If the issue arose after a transport request, ensure that all related objects were transported correctly and that there are no inconsistencies between the development and production environments.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like /SAPAPO/MC62 (for planning book maintenance) or /SAPAPO/MC61 (for planning area maintenance) to manage variables and check their assignments.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on resolving it.
  Documentation: Refer to the SAP APO documentation for detailed information on managing planning books and variables.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or APO support team for further assistance.