Processing gam_conv_pid.C... Error in : called with a null pointer Error: Symbol PndPidNeutralCand is not defined in current scope gam_conv_pid.C:19: Error: Symbol PndPidNeutralCand is not defined in current scope gam_conv_pid.C:19: Error: type PndPidNeutralCand not defined FILE:/home/kamalpdutta/Panda/fairsoft_mar15/pandaroot/KAMAL_WORKDIR/gam_conversion/./gam_conv_pid.C LINE:19 Error: Invalid type 'PndPidNeutralCand*' in declaration of 'punkt' gam_conv_pid.C:19: *** Interpreter error recovered ***