Message type: E = Error
Message class:  CNV_DMC_SIN_AM - Messages for Business Address Services 
Message number: 651
Message text: P.O. box postal code has the length 'zero'
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The SAP error message CNV_DMC_SIN_AM651 indicates that there is an issue with the postal code for a P.O. box entry, specifically that the postal code has a length of zero. This typically occurs during data migration or data conversion processes, particularly when using the SAP Data Migration Cockpit or similar tools.
Cause: Missing Data: The postal code field for a P.O. box entry is empty or not populated in the source data. Data Format Issues: The data being imported may not conform to the expected format, leading to the system interpreting the postal code as empty. Mapping Errors: There may be an issue with how the data fields are mapped during the migration process, causing the postal code to not be correctly assigned.
Solution: Check Source Data: Review the source data to ensure that all P.O. box entries have valid postal codes. If any entries are missing postal codes, they need to be corrected before migration. Data
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