Hi, in 2.23/11 when I do: { TH1F *histTest = new TH1F("histTest","Pt dist for all tracks",300,0,4); TPaveLabel *myLabel = new TPaveLabel(0.4,0.65,0.7,0.85,"..","NDC"); TCanvas *c5 = new TCanvas("c5","Pion mass check",10,10,500,500); c5->cd(1); myLabel->Draw(); } it works but { TH1F *histTest = new TH1F("histTest","Pt dist for all tracks",300,0,4); TPaveLabel *myLabel = new TPaveLabel(0.4,0.65,0.7,0.85,"BOO","NDC"); TCanvas *c5 = new TCanvas("c5","Pion mass check",10,10,500,500); c5->cd(1); myLabel->Draw(); } produces: root [1] Error in <RootX11ErrorHandler>: BadValue (integer parameter out of range for operation) (XID: 15132390) cheers Mat
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