Hi,
Check in dump is is coming at FM NUMBER_GET_NEXT and the sy-subrc is retured as 1.
If you check the FM documentation it is given like this.
Interval not found
The number range number could not be found for the object/sub-object.
The exception is also raised when no valid to-year is found for year-dependent objects.
check with your functional person ask him to check the Number range is assigned to that object or not.
Once try this and Revert.
Regards,
Pavan