Overflow error. Why?

For the code below, there is a form in which I take the values of start, end, and intervals (such as maintenance, training, or simplesmenet, interval).

If a user enters at the start: 23h10min00s: vector "start"will store "23" in "start (0)", "10 " in "start (1)" and "0" in "start (0)" and so also for the other vectors.

However, if a user type "20h15min10s" in the "beginning" and the "end" type "2h00min00s" (this is only possible if there another day), then the routine checks "end <start" and gives a Boolean value for the "midnight" and follow the code:

Code:

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If midnight = False Then 'if there was no change of days, then proceeded by calculating normal
Total_time_in_seconds = (3600 *end(0).Value + 60 * termino(1).Value + termino(2).Value) - (3600 * start(0).Value + 60 * inicio(1).Value + inicio(2).Value) - (3600 * interval(0).Value + 60 * interval(1).Value + interval(2).Value) - (3600 * maintenance(0).Value + 60 * maintenance(1).Value + maintenance(2).Value) - (3600 * training
(0).Value + 60 * training(1).Value + training(2).Value)

Else 'but if there was a change of days, then the total time in seconds is given by another formula:

'tells how many seconds the machine work:
FirstDay = 3600 * 24 - (3600 * beginning (0) + 60 * start (1) + start (2)) 'on first day
SecondDay = (3600 * finish (0) + 60 * end (1) + end (2)) 'and the second day

   
'sum over time, in seconds, the machine worked on the second day, and finally subtract the time of intervals
  Total_time_in_seconds = FirstDay + SecondDay - (3600 * interval(0).Value + 60 * interval(1).Value + interval(2).Value) - (3600 * maintenance(0).Value + 60 * maintenance(1).Value + maintenance(2).Value) - (3600 * training
(0).Value + 60 * training(1).Value + training(2).Value)

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What's wrong?

What data type are you using to declare your variables?

Nothing, just:

"Dim training(3)" or "Dim FirstDay"

I think I know where the error is. I separated these great phrases into smaller pieces:

Code:

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DownTime = (3600 * interval(0) + 60 * interval(1) + interval(2)) + (3600 * maintenance(0) + 60 * maintenance(1) + maintenance(2)) + (3600 * training(0) + 60 * training(1) + training(2))

If midnight = False Then
Total_time_in_seconds = (3600 *end(0) + 60 * end(1) + end(2)) - (3600 * start(0) + 60 * start(1) + start(2)) - DownTime

Else

FirstDay = (3600 *start(0) + 60 * start (1) + start (2))
FirstDay = 3600 * 24 - FirstDay 'HERE IS THE ERROR: 3600*24. Why?
SecondDay = (3600 * finish (0) + 60 * end (1) + end (2))

   
  Total_time_in_seconds = FirstDay + SecondDay -DownTime

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You should ALWAYS specify a data type. Leaving the data type off of a declaration will cause the variable to become a Variant, and your overload could be because you are exceeding what a Variant can hold.

Start with declaring them as longs and see if that fixes the problem.

I tried, but it's not working as well:

Sub seconds_day()

MsgBox 3600 * 24

End Sub

We need use CLng()

Sub test()
Dim x As Long
x = CLng(3600) * 24
MsgBox x
End Sub