Your confusion arises because Sheet1 is the worksheet name as well as the
object itself. To use the worksheet name, you need to use something like:

Worksheets("sheetindex").Range("M15:M1038")


"JacksonRJones" wrote in message
...
Hello. I was trying to call a fourier transform from vba and refer to the
worksheet the input data was on using a string variable. Here's the code:

Application.Run "ATPVBAEN.XLA!Fourier", sheetindex.Range("M15:M1038"),
sheetindex.Range("O15:O1037"), False, False

where sheetindex is a string type variable containing the name of the
worksheet. The following code works if the data is on sheet1:

Application.Run "ATPVBAEN.XLA!Fourier", sheet1.Range("M15:M1038"),
sheet1.Range("O15:O1037"), False, False

I get an error which says "invalid qualifier". I also tried setting the
active worksheet to the worksheet named by the string type variable and
then
writing Activeworksheet.range to try and get the range right, but that
didn't
work either. Any help would be greatly appreciated,

Jackson