@acer 

That was it.

@acer 

Thanks for your help.

I have a datafile that has the curve. The document with the issue had a lot of other things in it (I suppose I will attach it and the datafile). Initially, I made a stripped down version to attach, and that is working correctly. So I'm attaching an excel file and a maple worksheet. The maple worksheet is looking in the working directory for the excel sheet. The problem is equation 1.13. The result that Maple shows is Q:=Int(CrssOfVds, 0.1768..20.0). My test document has Q:=2.69e-9, which is what I'm looking for.

fds8449.xlsx

Fet_Capacitance_Extraction2.mw

@Carl Love 

Thanks Carl, I think I am using the syntax that you are using, but getting error.