SAP Message 5W048 - Number range object HRWFOBJECT for subobject &1 is causing problems.

Diagnosis The number range object HRWFOBJECT with the sub-object specified(Object type) provides no numbers. Therefore, it is not possible tocreate tasks with the above object type. Procedure Please check the number range for tasks via transaction SNUM.The interval '01' only is used for exclusively internal number rangeassignment. This may not be flagged as external. If such an entry is notthere, please enter it.