Using xl2003. My data is around 200+K total. Seeking help to enhance the sub
by Bernie Dietrick below, to snake the results to the next col B (and so on,
as required, to col C, D, etc) once col A in "Alldata" (this sheet is
created by the sub) is filled up to the brim. Thanks.

'--------------
Sub OneColumnV2()
''''''''''''''''''''''''''''''''''''''''''
'Macro to copy columns of variable length'
'into 1 continous column in a new sheet '
'Modified 17 FEb 2006 by Bernie Dietrick
''''''''''''''''''''''''''''''''''''''''''
Dim iLastcol As Long
Dim iLastRow As Long
Dim jLastrow As Long
Dim ColNdx As Long
Dim ws As Worksheet
Dim myRng As Range
Dim ExcludeBlanks As Boolean
Dim myCell As Range

ExcludeBlanks = (MsgBox("Exclude Blanks", vbYesNo) = vbYes)
Set ws = ActiveSheet
iLastcol = ws.Cells(1, ws.Columns.Count).End(xlToLeft).Column
On Error Resume Next

Application.DisplayAlerts = False
Worksheets("Alldata").Delete
Application.DisplayAlerts = True

Sheets.Add.Name = "Alldata"

For ColNdx = 1 To iLastcol

iLastRow = ws.Cells(ws.Rows.Count, ColNdx).End(xlUp).Row

Set myRng = ws.Range(ws.Cells(1, ColNdx), _
ws.Cells(iLastRow, ColNdx))

If ExcludeBlanks Then
For Each myCell In myRng
If myCell.Value < "" Then
jLastrow = Sheets("Alldata").Cells(Rows.Count, 1) _
.End(xlUp).Row
myCell.Copy
Sheets("Alldata").Cells(jLastrow + 1, 1) _
.PasteSpecial xlPasteValues
End If
Next myCell
Else
myRng.Copy
jLastrow = Sheets("Alldata").Cells(Rows.Count, 1) _
.End(xlUp).Row
myCell.Copy
Sheets("Alldata").Cells(jLastrow + 1, 1) _
.PasteSpecial xlPasteValues
End If
Next

Sheets("Alldata").Rows("1:1").entirerow.Delete

ws.Activate
End Sub
'----------