get_start_before_status_date

Get the start start of an activity in a certain tracking period.

This function can only be called after P2Tracking:construct_schedule_prediction calling the function and returns the activity start time for activities that started before the current status date of the tracking period (i.e. activities that are already finished or in progress).

Parameters: 
I/O Type Name Description
input integer ID activity ID
input integer ID ID of the tracking period
output integer start activity start time or 99999999 when not started yet
Example: 
function ()
        io.write('\n')
end
Class: 
P2Tracking