Message type: E = Error
Message class:  AR - SSRV function module messages 
Message number: 167
Message text: ESR Participant number may contain numbers only, but no zeros
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The SAP error message AR167, which states "ESR Participant number may contain numbers only, but no zeros," typically occurs in the context of Electronic Service Requests (ESR) or when dealing with specific configurations in SAP related to electronic invoicing or document processing.
Cause: The error arises when the ESR Participant number you are trying to enter contains a zero ('0'). According to the system's validation rules, the participant number must consist solely of numeric characters, and it cannot include the digit zero. This restriction is often in place to ensure that participant numbers conform to specific formats required by regulatory or business standards.
Solution: To resolve this error, you should: Check the Participant Number: Review the ESR Participant number you are trying to enter. Ensure that it does not contain any zeros. If it does, replace the zeros with other numeric characters (1-9). Update Configuration: If you are responsible for maintaining the configuration, ensure that the
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