hello Tom Ogilvy or any one that could help me fix the procedu

Attached is my code. as you can see i am determining the number of J
marks in coulmn which they all start at cell A3 in sheetQDS. the number
of marks =Nu, as you can see i am looping from 1 to Nu. but the problem
with this code, it works fine if all my marks are J1....J2....J3 so
that there is no gaps in the numbering system and the number after the
J is an integer. it does not work if i have J1A, OR J5C. how could i
fix it to do that regrdless whether there is a gap or not or wheteher
it is a J1 OR J1S? Thanks for any assitance!

'get the number of marks
lastrow = shtQDS.Range("A3").End(xlDown).Row
Set rng = shtQDS.Range("A3:A" & lastrow)
v = rng
On Error Resume Next
For M = LBound(v) To UBound(v)
nodupes.Add v(M, 1), CStr(v(M, 1))
Next
On Error GoTo 0
numUnique = nodupes.Count
If shtWOOD.Cells(1, 2).Value = "ALL" Then
'Nu = shtQDS.Range("BC1").Value
Nu = numUnique
End If
For Z = 1 To Nu Step 1
strMark = "J" & Z
Application.ScreenUpdating = False
'Error check
'If strMark = "" Then
' MsgBox "No mark chosen. Analysis cancelled."
'GoTo CancelAnalysis
'End If

'Clear old data
shtEM.Range("B2:B9").clearcontents
shtEM.Range("B10:C13").clearcontents
shtPA.Range("B33:AO44").clearcontents
shtPA.Range("B66:AO75").clearcontents
'shtSummary.Range("A3:H1000").clearcontents
shtResults.Range("A3:AR65536").clearcontents
shtNPCJ.Range("B10:C13").clearcontents
intResultRow = 3

'Set initial values
i = 3
intLines = 0
intLoadCase = 1
boolCancel = False

Application.ScreenUpdating = False
Worksheets.Add after:=Worksheets(Worksheets.Count)
NewSheet = ActiveSheet.Name
With Worksheets(NewSheet)
.Move after:=Worksheets(Worksheets.Count)
.Name = strMark
.Activate
Columns("A:A").ColumnWidth = 51.14
Columns("B:AR").Select
Selection.ColumnWidth = 13
ActiveWindow.Zoom = 75
End With

'Find out how many load cases we're dealing with
Mark:
Do
If shtQDS.Cells(i, 1).Value = strMark Then
If shtQDS.Cells(i, 4).Value intLoadCases Then intLoadCases =
shtQDS.Cells(i, 4).Value
End If
i = i + 1
Loop Until IsEmpty(shtQDS.Cells(i, 1))

i = 3

FindNext:

'Find valid row
Do
If shtQDS.Cells(i, 1).Value = strMark And shtQDS.Cells(i, 4).Value
= intLoadCase Then
GoTo GetValues
Else
i = i + 1
End If

Loop Until IsEmpty(shtQDS.Cells(i, 1))

'After no more valid rows for that load case, run optimization routine
Optimize

'Determine if any more load cases exist
If intLoadCase < intLoadCases Then
intLoadCase = intLoadCase + 1
i = 3
GoTo FindNext
End If

For R = 2 + Z To Nu + 3 Step 1
Sheets("Summary").Cells(R, 1).Value = strMark
Sheets("Summary").Cells(R, 2).Value = intQty
Sheets("Summary").Cells(R, 3).Value = dblLength
Sheets("Summary").Cells(R, 4).Value = intETCA
Sheets("Summary").Cells(R, 5).Value = intEBCA
Sheets("Summary").Cells(R, 6).Value =
Sheets(strMark).Range("D2").Value
Sheets("Summary").Cells(R, 7).Value =
Sheets(strMark).Range("E2").Value


Exit For

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