Message type: E = Error
Message class:  CNV_DMC_SIN_AM - Messages for Business Address Services 
Message number: 684
Message text: Use only digits in places &2 to &3 in postal code &1
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_DMC_SIN_AM684 indicates that there is an issue with the postal code format in your data migration process. Specifically, the error states that only digits should be used in certain positions of the postal code.
Cause: This error typically arises during data migration or data conversion processes when the postal code provided does not conform to the expected format. The message specifies that the characters in positions indicated by &2 to &3 of the postal code &1 must be numeric digits. This could happen due to: Incorrect Data Entry: Non-numeric characters (like letters or special characters) have been entered in the postal code field. Data Format Issues: The source data may have been formatted incorrectly, leading to invalid postal code entries. Data Mapping Errors: During the migration process, the mapping of fields may not have been set up correctly, causing the postal code to be populated incorrectly.
Solution: To resolve this error, you can
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