ADEXL Direct Plot error

Hi Folks,

I am having some strange trouble with Direct Plot in ADEXL (Results Tab -> Right click somewhere on a result -> Direct Plot -> Main form)

It goes like this:

1) I click Direct Plot -> Main Form and the form does not appear, when I check the CIW I get this error:

*Error* substring: argument #1 should be either a string or a symbol (type template = "Sx") - nil

2) I click Direct Plot -> Main Form again, this time the form appears, but I am not able to plot anything.  I try various results, click on various nets and terminals, but nothing plots

3) I exit the form and click Direct Plot -> Main Form again, and now it works properly.  Basically third time is the charm

It might be something in my setup, but I'd be awful grateful if someone knows what it is or what to check...

Thanks in advance,

Phil