Why does this happen

[Bruce]

can any one tell me why some times after i complete a flight and go to do instant replay by increasing the play back time it only gives me negative numbers exg (-1 and so on) and when i hit ok it say you have to enter numbers from 1 up. any help please.

[Pegase]

I have got similar thing by time in fuel/payload dialog. No minus sign but simply does not accept the number as they are.
Only solution: cancel button and re-open (some good old fashioned dirty words may help too)

When in replay dialog take care.

Never change the time of the day before a replay, all flight data are lost .

SOmetimes (may be it was linked to the fact I changed the flight plan within the flight) simply move the tower to the arrival airport can do the same.

Moral of the story: Set the time and date for wished lighting and tower position BEFORE the sequence you will replay