Error In Runtime First Go, No Error In Debug Or Second Go

The code thats generating the error is the following:


For Y = 8 To 131
TmpDate = Empty
Range("A1").Value = "=" + Path + Sheet + "B" + CStr(Y)
TmpDate = Range("A1").Value

For Langd = 1 To Len(TmpDate)
TmpChar = Mid(TmpDate, Langd, 1)
If Not TmpChar = " " Then
TmpComp = TmpComp + TmpChar
End If
Next Langd

TmpDate = TmpComp
TmpComp = Empty

If Len(Dag) = 1 Then
Dag = "0" + CStr(Dag)
End If

Macro continues before the Next-statement...

(it might not be good programming, but I think it should work).
A little explanation to the code.
I have a spreadsheet located on the intranet that has values I need in my spreadsheet. These figures are sorted by date, so I search for the date to find the right figures.
The line Range("A1").Value = "=" + Path + Sheet + "B" + CStr(Y)
works prefectly. I can see the value in my spreadsheet in the cell A1. its the next line that causes the error "Type mismatch".
The value I get from the intranet spreadsheet looks similar to this:
"1 Jul 2006 " (note all the spaces).
What I do is just run it through a loop and cut of all spaces so it will look like this: "1Jul2006" to be sure I dont miss a space or anything.

Now to the funny part.
The error only happens at runtime on the first go.
If I chose to END the macro then and there, and then run it again from the top it works perfectly.
If I set a stopsign to debug the code, it works perfectly on the first go too.
Can anyone explain to me why that happens??

I know enough about programming to handle my syntax errors and so on, but I cant see anything wrong in this one...

Please note that this isnt the the entire code.
I'm building a report on 12 diffrent spreadsheet. The main macro is almost 2000 rows of code, and it call other Subs too (because of limitations in the VBA-editor. A macro cant to be too big), so its impossible for me to post the entire macro...