Message type: E = Error
Message class:  O9 - IS-Oil: TD - Scheduling, loading, delivery confirmation 
Message number: 702
Message text: Enter start reading or/and end reading
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The SAP error message O9702, which states "Enter start reading or/and end reading," typically occurs in the context of utility billing or meter reading processes within SAP IS-U (Industry Solution for Utilities). This error indicates that the system requires either a start reading, an end reading, or both to proceed with the transaction.
Cause: Missing Readings: The most common cause of this error is that the user has not entered the required meter readings (either start or end readings) in the relevant fields. Incorrect Transaction: The transaction being executed may require readings that have not been provided or are not applicable. Data Entry Error: There may be a data entry error where the readings were supposed to be entered but were overlooked.
Solution: Enter Readings: Ensure that you enter both the start and end readings in the appropriate fields. If only one is required, make sure at least that one is filled in. Check Transaction Type: Verify
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