Message type: E = Error
Message class:  CNV_DMC_SIN - Messages for s-innovations migration 
Message number: 302
Message text: Unexpected Transaction Type &1 in the translation rule &2
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The SAP error message CNV_DMC_SIN302 indicates that there is an unexpected transaction type in the translation rule specified. This error typically arises during data migration processes, particularly when using the SAP Data Migration Cockpit (DMC) or similar tools.
Cause: The error can occur due to several reasons: Incorrect Transaction Type: The transaction type specified in the translation rule does not match the expected values defined in the system.
Configuration Issues: There may be a misconfiguration in the migration settings or the translation rules. Data Mapping Errors: The mapping of source data to target data may not be correctly defined, leading to unexpected transaction types. Version Compatibility: The version of the migration tool or the source system may not be compatible with the defined translation rules.
Solution: To resolve the CNV_DMC_SIN302 error, you can follow these steps: Check Translation Rules: Review the translation rule specified in the error message (&2) to ensure that the transaction type (&1) is valid and correctly
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