fsolve() crash with given Interval

[Angus]

Quote:You can use any independent var for plotimplicit, you just need to pass them as arguments in order to replace the default x,y.

Are you sure about that? The online help describes plotimplicit as

Quote:... Plots an implicitly defined curved from Expr(in x and y). Specifically, plots Expr=0. Note the use of lowercase x and y. With the optional x-interval and y-interval, plots only within those intervals....

It says nothing about other independents. Maybe HP treated the apps independantly from the rest of the system instead of considering the whole package? - I find myself struggling with this topic of interaction of data on a regular basis. Is plotimplicit part of the cas or the app? If cas than it seems the commands differs from xcas?

edit:
eq:=a^2+2*b
plotimplicit(eq,a,b) works executed in the cas. but typing in adv graphing gives syntax error. geometry seems to work.