RooFit Maximum of pdf

Dear all

Since sometime I am trying to do the following:

I am fitting a distribution with a convoluted pdf. Everything works great but I
trying to find the f(x) for a given x. I’ve done whatever found around but
unfortunately nothing works for me or I didn’t understood everything.

So basically I am having a landau conv. with gauss I find the xmax but for this
x I want to find the f(x). What I am getting back with pdf.getVal() is not the
value I see in the histogram.

Is there a way to do it?

Thanks in advance, George