I have the following code which copies a range from one worksheet to another,
both within the same workbook. If there is a duplicate date it copies over
the date, if new date it copies to the next available cell.

Dim rCell As Range
Dim rFound As Range
With Application.ThisWorkbook
Set rFound =
..Worksheets("Data").Columns("B").Find(What:=(.Wor ksheets("STD Calc") _
.Range("C6")), LookAt:=xlWhole, LookIn:=xlFormulas)
If rFound Is Nothing Then
Set rCell =
..Worksheets("Data").Range("A65536").End(xlUp).Off set(1, 0)
Else
Set rCell = rFound.Offset(-3, -1)
End If
Worksheets("STD Calc").Range("B17:Q37").Copy
rCell.PasteSpecial Paste:=xlValues
Application.CutCopyMode = False
End With
Dim RetVal As Variant
RetVal = Application.GetSaveAsFilename(Range("C2"))

If RetVal < False Then
ThisWorkbook.SaveAs RetVal & "xls"

End If

This copies two weeks of data at a time. on the 12th week or 6th iteration,
a maximum is reached. I want at that point to cause a MsgBox to pop up
indicating can't use the form go to form blah, blah.... and on OK the user
form is closed.

I think I know how to do the MsgBox itself. My question is how do I trigger
the MsgBox to appear? I know the cell in the worksheet where data is being
copied to that would represent the maximum. Would that be the place that
triggers the MsgBox? If so, how do I accomplish that?

As always thanks so much for your help!!!!