Try using

Personal.xls!SigTest(cell1, cell2, cell3, cell4)

in the worksheet

--
HTH

Bob Phillips

(replace somewhere in email address with gmail if mailing direct)

"John Wirtr" <John wrote in message
...
I've writtena User Defined Function that yields #NAME? when I use it in a
spread sheet. Why is this? The code for the function is below.

The code is in a module in PERSONAL.xls. I have also tried it in a module
in the workbook where it is used. Same result.

This UDF used to work for me. What am I doing wrong?

John Wirt

Function SigTest(cell1, cell2, cell3, cell4)
Dim testval As Long
testval = (cell1 - cell2) * (cell1 - cell2)
testval = testval / (cell3 * cell3 + cell4 * cell4)
If testval 3.841447 Then
SigTest = "*"
Else
SigTest = ""
End If
End Function