Message type: E = Error
Message class:  56 - HR TRAVEL: Messages for Trip Costs Dialog 
Message number: 780
Message text: Number range object &: Interval not found
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The SAP error message "56780 Number range object &: Interval not found" typically indicates that the system is unable to find a valid interval for a specified number range object. This can occur in various scenarios, such as when creating documents, posting transactions, or generating unique identifiers.
Cause: Missing Number Range Interval: The number range object does not have any defined intervals. This can happen if the intervals were not set up correctly during configuration. Inactive Number Range: The number range object may be inactive or not properly defined in the system. Authorization Issues: The user may not have the necessary authorizations to access the number range object. Configuration Errors: There may be errors in the configuration of the number range object in the relevant customizing settings.
Solution: Check Number Range Configuration: Go to transaction code SNRO (Number Range Objects). Enter the number range object that is causing the issue and check if there are any defined intervals. If intervals
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