TGraph GetFunction problem

another newbe problem :
To get the parameters of a fitfunction applied
to a TGraph i did the following,

TF1 *f1 = new TF1(“fitit”,“gaus”,-8,8);


TF1 *fitted = graph->GetFunction(“fitit”);

Double_t para1 = fitted->GetParameter(0);

which doesn’t work, actually it crashes root:

*** Break *** segmentation violation
Generating stack trace…TBla TBla TBla

Please give me some advice how to do that right.

I solved it: i had to include TList in my header !