Message type: E = Error
Message class:  CNV_CDMC_UCIA - CDMC Upgrade/Change Impact Analysis 
Message number: 034
Message text: Select only one row for extended syntax check
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The SAP error message CNV_CDMC_UCIA034 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that the system expects only one row to be selected for an extended syntax check, but multiple rows have been selected instead.
Cause: Multiple Rows Selected: The primary cause of this error is that the selection criteria used in the migration or conversion process returned multiple rows when the system expected only one. Data Integrity Issues: There may be issues with the data integrity in the source system, leading to duplicate entries or unexpected results.
Configuration Issues: Incorrect configuration in the migration settings or mapping can lead to unexpected results.
Solution: Review Selection Criteria: Check the selection criteria used in the migration or conversion process. Ensure that it is designed to return a single row. You may need to refine the filters or conditions. Data Validation: Validate the data in
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