How about this? 
{
TFile *ff = new TFile("R123.root");
TTree *tt;
ff->GetObject("RawData", tt);
tt->Draw("xf:xr");
} Or perhaps this? <img src="/uploads/default/original/2X/8/84c2fe9464a4066c00e1bd5978e913e7869cbb07.gif" width=“22” height=“16” alt=":-"" title=“Whistle”/> {
TFile *ff = new TFile("R123.root");
TTree *RawData;
ff->GetObject("RawData", RawData);
RawData->Draw("xf:xr");
} And maybe see this! 
[url]A strange annoying interpreter problem