Hi Root people,
I have a macro that was written for ROOT on the NT. This macro utilizes
two global TStrings that are set by the user prior to calling the macro.
The macro then attempts to use these strings as the arguments in a call to
TTree::Draw(), one argument for the variable, one for the cut. This
yields no problem on the NT machine, but on the Linux (RedHad 5.2, using
ecgs 1.0.3, and Root 2.21/01) this generates an error:
TString varname = "x"
TString cut = "D>.3"
//macro begins
{
// sample routine to plot the results
c1 = new TCanvas("PDE:Results","PDE Results",131,0,698,830);
Pad1 = new TPad("Signal","Signal",0.0341297,0.538576,0.464164,0.970326,21);
Pad2 = new TPad("Background","Background",0.520478,0.540059,0.950512,0.974777,21);
Pad3 = new TPad("Test","Test",0.0307167,0.074184,0.460751,0.5,21);
Pad4 = new TPad("pad4","The Surface",0.518771,0.075667,0.947099,0.50,21);
c1->Draw();
Pad1->Draw();
Pad2->Draw();
Pad3->Draw();
Pad1->cd();
cout << varname << endl;
cout << cut << endl;
pdeSignalResult->Draw(varname,cut);
...
Where pdeSignalResult is a TTree that contains the variable x.
It is this last line that generates the error:
Error: Can't call TTree::Draw() in current scope
FILE:plotit.C LINE:16
*** Interpreter error recovered ***
Thanks,
Andrew Askew
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