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Runtime script with inexplicable results...

I have a function in my scripts to calculate the runtime in seconds for a program, using the Timer value from windows, which returns the current time as seconds from midnight.

The blue code is my script run at the beginning of a part program. The red code is what is run at the end. (I've cut and pasted these sections from the scripts...they are too long.) In the event that a program runs through midnight, I have a section in the red code to correctly calculate runtime. I've tested this code in the excel editor while resetting my computer clock to 11:59 PM and running it through midnight, and it works. Unfortunately, this code does not work when running PC-DMIS through midnight. I get program times of more than 86400.

Any ideas why this is not calculating correctly only when run through PC-DMIS?

[COLOR="Blue"]Sub Main()

Dim BeforeTime As String
BeforeTime = Timer
BeforeTime = CLng(BeforeTime)

End Sub[/COLOR]

[COLOR="Red"]
Sub Main()

Dim Aftertime As String
Aftertime = Timer
Aftertime = CLng(Aftertime)
Dim RunTime As String

If Aftertime < BeforeTime Then
RunTime = (86400 - BeforeTime) + Aftertime
Else
RunTime = Aftertime - BeforeTime
End If

End Sub[/COLOR]
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