Double_t fieval=TMath::Abs((Double_t)fiel->SolenoidField()/10.);
printf("Magnetic field is %6.2f Tesla\n",fieval);
if(fBz!=fieval) {
Double_t fieval=TMath::Abs((Double_t)fiel->SolenoidField()/10.);
printf("Magnetic field is %6.2f Tesla\n",fieval);
if(fBz!=fieval) {