How To Fix /SAPAPO/OM_ERROR2156 - The operation called is not allowed in this matrix status

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/OM_ERROR2 -

• Message number: 156

• Message text: The operation called is not allowed in this matrix status

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 /SAPAPO/OM_ERROR2156 - The operation called is not allowed in this matrix status ?

  The SAP error message /SAPAPO/OM_ERROR2156 indicates that an operation is being attempted on a matrix (such as a planning or production matrix) that is not allowed due to its current status. This typically occurs in the context of SAP Advanced Planning and Optimization (APO) when trying to perform actions that are restricted based on the matrix's state.
  Cause:
  The error can be caused by several factors, including:
  
  Matrix Status: The matrix may be in a status that does not permit the operation you are trying to perform. For example, if the matrix is locked, archived, or in a state that does not allow changes.
  User Permissions: The user may not have the necessary permissions to perform the operation on the matrix.
  Configuration Issues: There may be configuration settings in the system that restrict certain operations based on the matrix status.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Matrix Status: 
  
  Review the current status of the matrix you are trying to work with. You can do this by navigating to the relevant transaction or using the appropriate reporting tools in SAP APO.
  If the matrix is locked or in a non-editable state, you may need to unlock it or change its status.
  
  
  
  Review User Permissions:
  
  Ensure that the user attempting the operation has the necessary authorizations. You may need to consult with your SAP security team to verify and adjust user roles and permissions.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation or help files related to the specific matrix and its operations. This can provide insights into what actions are permissible based on the matrix's status.
  
  
  
  Contact SAP Support:
  
  If the issue persists and you cannot determine the cause, consider reaching out to SAP support for assistance. They can provide more detailed insights based on the specific configuration and version of your SAP system.
  
  
  
  Check for Customizations:
  
  If your organization has implemented custom enhancements or modifications, ensure that these are not interfering with standard operations.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes in SAP APO that can help you view and manage matrix statuses (e.g., /SAPAPO/OM for operations management).
  SAP Notes: Search for SAP Notes related to this error message in the SAP Support Portal. There may be specific patches or updates that address known issues.
  Training and Documentation: Ensure that users are trained on the proper procedures for managing matrix statuses and understand the implications of different statuses on operations.
  
  By following these steps, you should be able to identify the cause of the error and take appropriate action to resolve it.