SAP Message U1318 - No data created for the given selection since the last run

Diagnosis
No new data exists in interface table T5UT1 for the given selectioncriteria. All existing data was generated in the last run.

Procedure
Before you can generate a correction form, a corresponding originalform must first have been generated. Furthermore, changes in theinterface tables must have occurred since the last generation run.
If both of these conditions are met, then the table entries thatoccurred after the last run will be shown on your correction form.