How to manual generate PM work order?

If there is a red exclamation mark next to the Forecast / Schedule and Manual Generate button, it means there are work orders that have not been generated yet

1. Proceed to Preventive > Forecast / Schedule 
2. Click Manual Generate button
3. The system will display the dates on which work orders have not been generated yet
4. Select the date of the passed schedule
5. Click Submit to generate all PM schedules based on the selected date

Note: Once all incomplete dates have been manually generated, the red exclamation mark will disappear