Message type: E = Error
Message class:  CNV20551 - message for package 20551 (company code delete) 
Message number: 173
Message text: Table &1: Criterion &2 is ineffective; no alternative; exclude the table?
For the selected criterion &V2& for table &V1&, there are no instances
for deletion in the related object table.
Consequently, criterion &V2& is ineffective.
There do not seem to be any alternative deletion criteria.
Warning
Check the message. If no programs were generated yet and no jobs were
scheduled, exclude the table from the deletion to improve performance.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV20551173 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that a specific criterion for a table is ineffective, meaning that the data in that table does not meet the required conditions for processing, and there are no alternative criteria available to handle the data.
Cause: Ineffective Criterion: The specified criterion for the table is not valid or does not match any records in the source data. This could be due to incorrect mapping, missing data, or data that does not meet the expected format or conditions. Data Quality Issues: The data in the source system may have inconsistencies, missing values, or other quality issues that prevent it from being processed.
Configuration Issues: There may be configuration settings in the migration tool that are not set up correctly, leading to the inability to process the data as
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