Message type: E = Error
Message class:  HRGB_GBRTI - Messages for RTI 
Message number: 137
Message text: Fuel Type must have one of these values &2, and not &1.
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The SAP error message HRGB_GBRTI137 indicates that there is an issue with the fuel type value being used in a specific context, likely related to a configuration or data entry in the SAP system. The message specifies that the fuel type must be one of the allowed values (denoted by &2) and that the value currently being used (denoted by &1) is not acceptable.
Cause: Invalid Fuel Type: The fuel type entered does not match any of the predefined valid values in the system. Configuration Issue: The configuration settings for fuel types may not be set up correctly, or the valid values may not have been defined properly. Data Entry Error: There may have been a typographical error or incorrect selection made during data entry.
Solution: Check Valid Values: Review the list of valid fuel types in the system. This can usually be found in the configuration settings or documentation related to the specific module you
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