Message type: E = Error
Message class:  CNV_DMC_SIN - Messages for s-innovations migration 
Message number: 227
Message text: Indicator:Restrictable &1 is not valid; enter X or leave the field empty.
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The SAP error message CNV_DMC_SIN227 indicates that there is an issue with the input for a specific indicator in the Data Migration Cockpit (DMC) or a related tool. The message states that the indicator you are trying to set is not valid, and it expects either an "X" (to indicate that the indicator is active) or an empty field (to indicate that the indicator is not active).
Cause: Invalid Input: The field for the indicator is likely populated with an invalid value that is neither "X" nor empty. Configuration Issue: There may be a configuration issue in the migration settings or the specific migration object you are working with. Data Type Mismatch: The field may be expecting a specific data type or format that is not being adhered to.
Solution: Check Input Value: Ensure that the field for the indicator is either set to "X" or left empty. Remove any other values that may have been
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