Message type: E = Error
Message class:  /SAPAPO/DMMOD -  
Message number: 051
Message text: Deleting active model is not allowed
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The SAP error message /SAPAPO/DMMOD051 indicates that there is an attempt to delete an active model in SAP Advanced Planning and Optimization (APO), which is not permitted. This error typically arises when a user tries to delete a planning model that is currently active or in use.
Cause: Active Model: The model you are trying to delete is currently active. In SAP APO, models must be inactive before they can be deleted. Dependencies: There may be dependencies or references to the model in other processes or configurations, preventing its deletion. User Permissions: The user may not have the necessary permissions to delete the model, although this is less common for this specific error.
Solution: To resolve this error, follow these steps: Deactivate the Model: Navigate to the model management area in SAP APO. Find the model you wish to delete. Change the status of the model from "Active" to "Inactive". This is usually done through the model's properties or settings. Check
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