SAP Message RY108 - Unable to assign an internal number

Diagnosis
So that the system saves the newly created generic transaction &V1&under a unique name, a number from the number range interval is assignedto the generic transaction (technical information: Number range objectRM_RIDXRT). This process failed.

System Response
The processing of the generic transaction was canceled, and the generictransaction was not saved.

Procedure
Check the interval of the number range object concerned.