TChain & Symbol chain is not defined in current scope

From: Nevzat Guler <nguler_at_jlab.org>
Date: Tue, 16 Jan 2007 19:07:38 -0500 (EST)

	Hello,
	I wrote the short program below to chain many root files together.

In the root session I link the program:
root [25] .L myChain.C

Then I run the program as:
root [26] myChain(28074, 28080);

it does not complain about anything. So i assume it chained all the root files in the list.
Then I try to draw saomething from the chain by saying: root [27] chain.Draw("IPLOTS.ECT_el:IPLOTS.ECin_el >> h2","","colz");

it says:
Error: Symbol chain is not defined in current scope (tmpfile):1: Error: Failed to evaluate chain.Draw("IPLOTS.ECT_el:IPLOTS.ECin_el >> h2","","colz")Possible candidates are... filename line:size busy function type and name *** Interpreter error recovered ***

Program myChain.C is printed below:

P.S. In this program I also tried to pass root file name quoted as "28074.root" by creating the file name accordingly. But it also did not work. I concluded it is not issue with " sign. In the version below I dont have " sign attached to the ends of root file name..

Thank you very much with your inputs..

                            Nevzat Guler



#include <stdlib.h>

#include <vector>

#include <iostream>

#include <fstream>

#include <stdio.h>

#include <stdarg.h>
#include <string.h>
#include "TCanvas.h"
#include "TVirtualPad.h"
#include "TPostScript.h"
#include "TLegend.h"
#include "TChain.h"

using namespace std;
#include "/u/home/nguler/inc/utils.h"

void myChain(int minrun, int maxrun)
{

  TChain chain("T");
  for (int run=minrun; run<=maxrun; run++)   {

    string filepathName = "/p/clas-disk1/nevzat/trees/group/";     string runstring;
    runstring = IntToString( run );
    string file(runstring);
    file.append(".root");

    filepathName.append(file);
    int fileExist = 0;
    fileExist = pathExists( filepathName.c_str() );

    if ( fileExist == 1 )
    {

      cout << "Adding " << file << endl;
      chain.Add( file.c_str() );

    }

  }

} Received on Wed Jan 17 2007 - 01:07:47 CET