I have a simulation period about 24 hours (86400 seconds), after 4 hours no more vehicles will be generated.

The problem occurs because for traffic from matrices it is required that the destination parking lot at the time of departure has still open for the whole simulation period (not only for the remaining simulation period). That means a opening time of 99.999 seconds is not enough for a simulation period of 86.400 simulation seconds from a departure time 13599,1.

Please define a opening time of 999.999 for all parking lots, then it will work.