I have a fixed range of cells (41) that I need to chart. The user may or may
not fill all the final cells. I need to exclude these unused cells at the end
from the chart.

Dim LastColReservedCell As Integer
Dim LastActiveCell As Integer
Dim MyRange As Range

LastActiveCell = 0
LastColReservedCell = 41

For Each c In Worksheets("Charts").Range _
("B1:B41").Cells

If c.Value < 1 Then
Blanks = Blanks + 1
Else
Blanks = Blanks
End If
Next

LastActiveCell = LastColReservedCell - Blanks

'Here is where the problem starts. Trying to build the range generates an
error 13.
MyRange = "A1:" + LastActiveCell

'If I can build a valid Range, I would like to use it as shown below:

ActiveChart.SetSourceData Source:=Sheets("Charts").Range(MyRange), PlotBy _
:=xlColumns

'Using (MyRange) instead of ("A1:B41")

Is this possible?

Thank You for your help.