F9 is still calculating the report. Refreshing more complicated reports or entire workbooks (Shift + F9) can take more time.
To determine if F9 is still calculating:
- Access Task Manager by pressing Ctrl + Alt + Del then clicking Task Manager in the window that appears
- Select the Processes tab
- Click the column heading Image Name to sort processes alphabetically
- Locate F9.exe
- Note that the Mem Usage column is fluctuating. This indicates the program is still calculating.