Message type: E = Error
Message class:  CNV_CDMC_UCIA - CDMC Upgrade/Change Impact Analysis 
Message number: 090
Message text: Select only one row to change the status
More than one objects are selected in the ALV display for the function
The function works for only one selected object in the ALV display
Select only one row in the ALV display, then execute the function again
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_CDMC_UCIA090 typically occurs in the context of data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that the system expects you to select only one row for a specific operation, but multiple rows have been selected instead.
Cause: The error is caused by the following scenarios: Multiple Selections: You have selected multiple entries in a table or list where the system expects only one entry to be processed at a time. User Interface Limitation: The user interface may not allow batch processing for certain operations, requiring a single selection. Data Integrity: The operation you are trying to perform may require a unique identifier or a single record to ensure data integrity.
Solution: To resolve the error, follow these steps: Review Your Selection: Go back to the screen where the error occurred and ensure that you have selected only one row. Deselect any additional rows
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