"If" Condition Triggering Inappropriately With Differences In Time Into The Next Day

[Ark68]

I have this snippit of code

With ws_dsched
        .Unprotect
        For i = 6 To 47
            If IsNumeric(Left(.Cells(i, 8), 3)) Then
                sw = sw + 1
                stv = .Cells(i, 9)
                edv = .Cells(i, 10)
                If Not IsNumeric(stv) Then
                    .Cells(i, 9).Interior.Color = RGB(255, 0, 0)
                    ers = ers + 1
                End If
                If Not IsNumeric(edv) Then
                    .Cells(i, 10).Interior.Color = RGB(255, 0, 0)
                    ers = ers + 1
                End If
                If stv >= edv Then
                    .Cells(i, 9).Interior.Color = RGB(255, 0, 0)
                    ers = ers + 1
                End If
                Stop
                td = (edv - stv) * 24
                If td <> .Cells(i, 11) Then
                    .Cells(i, 11).Interior.Color = RGB(255, 0, 0)
                    ers = ers + 1
                End If
            Else
                snw = snw + 1
                'MsgBox "This is NOT a number."
            End If
        Next i
        If ers > 0 Then
            MsgBox "Please correct the highlighted errors."
            Exit Sub
        End If
End With

I am running into a issue with differences in times that cross over into the next day.
For example,
stv = 4:00 PM
edv = 0:00 AM

With this example, the code in blue will trigger as stv (start time) is greater than edv (end time), which yes is true, but not in this case. The shift is 8 hours from 4:00pm and carries into the next day. The code shouldn't trigger in this instance.

The value of edv is taken from a cell in the worksheet that has a formula of "=($J$11-$I$11+IF($J$11<$I$11,1,0))*24" which assists with user data entry error checking on the worksheet .

How can I overcome this while avoiding having to rewrite my code up to this point?

 

[Ark68]

This is also causing problems with

td = (edv - stv) * 24
If td <> .Cells(i, 11) Then
    .Cells(i, 11).Interior.Color = RGB(255, 0, 0)
    ers = ers + 1
 End If

I substituted

td = (edv - stv) * 24

with

td = (edv - stv + (edv < stv)) * 24

But it's still flagging it as an error according to my criteria. The value of dt when stv = 4:00PM and edv = 0:00 AM is -40.

 

[NoSparks]

Shouldn't the true/false outcome of (edv<stv) be added to edv only, in effect adding a day, prior to doing the subtraction ?

 

[Ark68]

Hello NoSparks. Thanks for chiming in.
To simply answer your question, I honestly don't know. I'm not certain I understand what your are suggesting. Sorry.

 

[NoSparks]

Oh, sorry, that's what you actually had, but
TRUE is 1 in a formula, and -1 in VBA
so try

td = (edv + Abs(edv < stv) - stv) * 24