Hi, I am trying to make graph array, so i can use it. programe looks like(where i am defining graph array) for(int i = 0 ; i < nent ; i++) { cout << " Col[i] " << Col[i] << endl; gr[i] = new TGraphErrors(n,Z,Ent[i],Ez,Eent[i]); gr[i]->SetMarkerColor(Col[i]); gr[i]->SetMarkerStyle(Sty[i]); } when i am running my code i am getting following message --------------------------------------------------- Col[i] 7 Col[i] 6 Error: Array index out of range gr -> [1] valid upto gr FILE:test.C LINE:156 *** Break *** segmentation violation --------------------------------------------------- Which shows that when it goes secound time in the loop it having problem. Please let me know what i am doing worng. Thanks for any help Avdhesh
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