#include <TFile.h>
#include <TTree.h>

int main()
{
	TFile* in = new TFile("~larcalib/w0/data/WorkingDirectory/00129019_00129020_00129024_Barrel-EMB-EMEC_MEDIUM_26_15.0.0_1/rootFiles/LArCaliWave_00129020_EB-EMBA_StripsXtalkCorr.root","READ");
	TFile* out = new TFile ("./out.root","RECREATE");

	TTree* cw = (TTree*) (in->Get("CALIWAVE"));

	cw->Scan ("channelId", "FT==0 && slot==2 && channel==1"); 
	// that works fine! - 1 record is printed out

	TTree* tr = cw->CopyTree("FT==0 && slot==2 && channel==1");
	// that throws a bad_alloc exception

	out->Write();
	out->Close();
	in->Close();
}