Message type: E = Error
Message class:  CNV_10100 - Messages from package 10100 
Message number: 020
Message text: Lower/upper limit for swap: &1 &2
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The SAP error message CNV_10100020 with the description "Lower/upper limit for swap: &1 &2" typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that there is an issue with the configuration of the swap limits for a specific data field or parameter.
Cause: The error is generally caused by one of the following reasons: Invalid Configuration: The lower and upper limits for a swap value are not set correctly, leading to a situation where the data being processed falls outside these limits. Data Quality Issues: The data being migrated may contain values that exceed the defined limits, causing the migration process to fail. Parameter Mismatch: There may be a mismatch between the expected data type or range and the actual data being processed.
Solution: To resolve the error, you can take the following steps: Check Configuration: Review the configuration settings for the swap limits
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