Read Each line not reading through entire file - vb.net

Question

I am using Vb to take a .txt file, parse it, and check for errors. My code works just fine, however, the code does not go through the entire file. It stops, on average, 20 lines shy of the EOF.
I am using the following
For Each lines As String In System.IO.File.ReadLines(myFile)
from here I parse the line and see if it needs any fixes.
Is there something that I'm missing or something that just cant be avoided.
The files that I'm reading in are about 150,000 KB to 230,000 KB and over 2 million lines.
As requested, the following is my code. Warning, I just started using Vb...
Module Module1
Sub Main()
Dim root As String = "C:\Users\mschramm\Documents\Agco\WindSensor\Data\filestobecleaned\"
Dim datafile As String = root & "ES.txt"
Dim outfile As String = root & "temptry.txt"
Dim output As System.IO.StreamWriter = My.Computer.FileSystem.OpenTextFileWriter(outfile, False)
Dim k As UInteger = 0
Dim fixes As UInteger = 0
Dim time As ULong = 0
Dim count As UInteger = 0
Dim n As UInteger = 0
Dim LineCount As UInteger = 0
Dim TimeStep As ULong = 100
Dim Solar As UInteger = 0
For Each lines As String In System.IO.File.ReadLines(datafile)
LineCount = LineCount + 1
'Console.WriteLine(LineCount)
Dim parsedline As String() = Split(lines, ",")
If IsNumeric(parsedline(0)) = True And UBound(parsedline) = 8 Then
'TimeStep = parsedline(0) - time
Solar = parsedline(1)
time = parsedline(0)
output.WriteLine(lines & " Good Line")
count = count + 1
Else
Dim j As UInteger = 0
Dim ETX As Integer = 0
Dim STX As Integer = 0
Dim datacheck As Boolean = False
Dim fixedline As String = ""
Dim newtime As ULong = 0
For j = 0 To UBound(parsedline)
Dim a As Char = parsedline(j)
If a = (Chr(3)) Then ETX = j
If a = (Chr(2)) Then STX = j
Next
j = 0
If (STX < ETX) And (ETX - STX) = 6 And STX >= 2 Then
If Len(parsedline(STX + 1)) = 8 And Len(parsedline(STX + 2)) = 8 And Len(parsedline(STX + 3)) = 8 Then
Dim g = Len(parsedline(STX - 2))
While (j < g) And datacheck = False
If IsNumeric(parsedline(STX - 2)) Then
If parsedline(STX - 2) - time < 10000 And parsedline(STX - 2) - time > 0 Then
newtime = Right(parsedline(STX - 2), Len(parsedline(STX - 2)))
Solar = parsedline(STX - 1)
'TimeStep = newtime - time
fixedline = newtime & "," & parsedline(STX - 1) & "," & parsedline(STX) & "," & parsedline(STX + 1) & "," & parsedline(STX + 2) & "," & parsedline(STX + 3) & "," & parsedline(STX + 4) & "," & parsedline(STX + 5) & "," & parsedline(STX + 6) & " Fixed Line"
datacheck = True
Else
j = j + 1
parsedline(STX - 2) = Right(parsedline(STX - 2), Len(parsedline(STX - 2)) - 1).ToString
End If
Else
j = j + 1
parsedline(STX - 2) = Right(parsedline(STX - 2), Len(parsedline(STX - 2)) - 1).ToString
End If
End While
End If
End If
If (STX < ETX) And (ETX - STX) = 6 And STX = 0 Then
If Len(parsedline(1)) = 8 And Len(parsedline(2)) = 8 And Len(parsedline(3)) = 8 And Len(parsedline(4)) = 1 And Len(parsedline(5)) = 2 And Len(parsedline(6)) = 3 Then
newtime = time + TimeStep
fixedline = newtime & "," & Solar & "," & parsedline(STX) & "," & parsedline(STX + 1) & "," & parsedline(STX + 2) & "," & parsedline(STX + 3) & "," & parsedline(STX + 4) & "," & parsedline(STX + 5) & "," & parsedline(STX + 6) & " Fixed Line Gave Time and Solar"
datacheck = True
End If
End If
If newtime < time And newtime > 1000 Then
Dim badtime As ULong = newtime
Dim firstdig As ULong = time
Dim loopcount As UInteger = 0
While firstdig > 9
firstdig = firstdig / 10
loopcount = loopcount + 1
End While
firstdig = firstdig * (10 ^ loopcount)
If (firstdig + badtime) > time Then
newtime = firstdig + badtime
If (newtime - (10 ^ loopcount)) > time Then
newtime = newtime - (10 ^ loopcount)
End If
End If
End If
If datacheck = True Then
k = k + 1
If (newtime > 500) Then
output.WriteLine(fixedline)
'count = count + 1
time = newtime
End If
End If
If datacheck = False Then
n = n + 1
If STX >= 0 And ETX > 0 And ETX - STX < 9 Then
Console.WriteLine(LineCount)
'n = n + 1
End If
End If
End If
Next
Console.WriteLine(count & " Good lines")
Console.WriteLine(k & " Lines Corrected")
Console.WriteLine(LineCount & " Total Lines")
Console.WriteLine(n & " Lines were thrown out")
Console.WriteLine(n / LineCount * 100 & "% thrown out")
End Sub
End Module
and here is a sample of the data
Time: 16:52:18.0
Date: 11/6/2014
Time,Sensor1,U,V,W
544161,219,Q,-001.341,+000.947,+000.140,M,00,17
544284,218,Q,-001.207,+001.074,+000.225,M,00,1C
544361,220,Q,-000.935,+000.898,+000.187,M,00,17
544460,220,Q,-001.299,+001.151,-000.009,M,00,17
This is what the last 10 lines look like
Q,+001.681,-003.510,-0356154697,236,Q,+000.826,-002.744,-000.559,M,00,19
Q,+000.474,-002.789,-0356155062,234,Q,+000.400,-002.975,+000.438,M,00,1D
Q,+000.813,-002.934,-0356155297,236,Q,+000.146,-002.129,-000.235,M,00,16
Q,+000.494,-002.234,+0356155497,236,Q,+000.681,-001.996,-000.248,M,00,1F
Q,+000.800,-001.999,-0356155697,236,Q,+001.181,-002.883,-000.795,M,00,1A
356156060,233,Q,+000.400,-002.106,+000.251,M,00,18
356156296,235,Q,+000.888,-001.026,+000.442,M,00,10
356156495,236,Q,+000.570,-001.694,+000.589,M,00,13
356156695,236,Q,+001.495,-002.177,-000.035,M,00,15
356157060,234,Q,+000.770,-003.484,-000.161,M,00,14
for this file, the code makes it to the 6th to last line.

Answer 1

Thanks to mafafu for pointing out the solution.
I never closed the file, so the addition of output.Close() fixed everything.
Once again, thank you mafafu.