Tricky (to me) memory leak when creating a TGraphErrors using copy constructor

[Wile_E_Coyote]

Use a “Clone”:

Tricky (to me) memory leak when creating a TGraphErrors using copy constructor

Can it be that you have a histogram with this name? Before these two lines and also after them, try to add: gROOT->ls(); if (gFile) gFile->ls(); if (gPad) gPad->ls(); You could also try to use: TGraphErrors *gGMp_Ratio_newRC = ((TGraphErrors*)(gGMp->Clone("gGMp_Ratio_newRC")));