Message type: E = Error
Message class: CNV20400 - Message class CNV20400
Message number: 034
Message text: &1 set to master/customizing!
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The SAP error message CNV20400034 typically relates to issues encountered during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. The error message indicates that a certain field (denoted by &1) is set to either a master data or customizing data, which may not be compatible with the expected data structure or requirements.
Cause: Data Inconsistency: The field in question may contain values that are not valid for the target system or do not meet the required format. Mapping Issues: There may be a problem with how the data is mapped from the source to the target system, leading to conflicts in data types or structures. Configuration Errors: The customizing settings in the target system may not align with the data being migrated, causing the system to reject the data. Missing Dependencies: The data being migrated may depend on other data that is not present or correctly configured
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