Message type: E = Error
Message class:  CNV_DMC_SIN_AM - Messages for Business Address Services 
Message number: 679
Message text: &4:There must be a letter in place &2 of P.O. box postal code &1
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_DMC_SIN_AM679 indicates that there is an issue with the postal code format in the system, specifically related to the P.O. box postal code. The error message states that there must be a letter in a specific position of the postal code.
Cause: This error typically arises when the postal code format does not conform to the expected standards for postal codes in the relevant country. In this case, it suggests that the postal code for a P.O. box is expected to contain a letter in a specific position, but the provided postal code does not meet this requirement.
Solution: To resolve this error, you can take the following steps: Check the Postal Code Format: Verify the postal code you are trying to enter. Ensure that it adheres to the required format for P.O. box postal codes in the relevant country. For example, if you are working with Singapore postal codes, they
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Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
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