If after the Statement Run, the warning is not removed:
1. Click on the Warning
2. The problem will be that the 'Last Performed Date' was not re-set correctly. Click on 'Process Debtors'
3. Select the 'Statement' tab
4. Perform the Statement Run again and set the dates as per the last statement run
Do not re-print the statements but DO process the Statement Run
5. At the last screen select the 'Close the Statement Run' button
6. The Warning button should now be gone.