Message type: E = Error
Message class:  CNV_CMIS_G - CMIS: general messages 
Message number: 015
Message text: All upgrade nodes removed from the process tree
The sender system and the receiver system are identical as far as
components/add-ons, releases and support package levels are concerned.
As no upgrade is necessary, the system removes all upgrade nodes in the
process tree.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_CMIS_G015 indicates that all upgrade nodes have been removed from the process tree during a conversion or upgrade process. This typically occurs in the context of SAP system migrations or upgrades, particularly when using the SAP S/4HANA Migration Cockpit or similar tools.
Cause: Incompatible or Missing Upgrade Nodes: The error may arise if the upgrade nodes required for the conversion process are not present or have been removed due to configuration issues or errors in the upgrade path.
Configuration Issues: Incorrect configuration settings in the migration or upgrade process can lead to the removal of necessary nodes. Data Consistency Issues: If there are inconsistencies in the data or if prerequisite steps were not completed successfully, the system may remove nodes to prevent further processing. System Errors: General system errors or interruptions during the upgrade process can also lead to this issue.
Solution: Check Upgrade Path: Ensure that you are following the correct upgrade
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