Message type: E = Error
Message class: CNV_DMC_MC - Migration Object Modeler
Message number: 120
Message text: Cannot use this option at this level; select a non-root structure node.
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The SAP error message CNV_DMC_MC120 typically occurs in the context of data migration or conversion processes, particularly when using the SAP Data Migration Cockpit (DMC) or similar tools. This error indicates that the user is trying to perform an action that is not allowed at the current level of the data structure, specifically at the root node level.
Cause: The error arises when: You are attempting to select or manipulate a root structure node in a way that is not permitted. For example, certain operations may only be valid for child nodes or specific sub-nodes within the data structure. The operation you are trying to perform requires a more granular selection than what is available at the root level.
Solution: To resolve this error, you can take the following steps: Select a Non-Root Node: Instead of trying to perform the action at the root level, navigate to a specific child node or sub-node within the structure and
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