Hi all, I seem to be having problems with submit.pl (in /nfs/farm/babar/AWG23/clarke1/newfitter1-24/VirVubFitter/fittest). Using Antonio's instructions (see attached) I am able to find the background and signal pdf parameters (by ./submit.pl -MC -bkg -lepcut -enr -dumppar -intpur 0.1 -mxl -30 -mxh 30) but when It comes to running over signal + background for the scan the fitter returns this error message: RooRealVar::setRange(mes) new range named 'mesint' created with bounds [5.27,5.2891] RooRealVar::setRange(mes) new range named 'bmesint' created with bounds [5.27,5.2891] USING CUTS mes> 5.22 && mx > 4.200000 && mx < 5.000000 && q2 > -999.000000 && q2 < 300.000000 && lepYaSe>0 && ksele == 0 && intpur > 0.100000 Number of entries in dataset: 108 scalefactor= 4.74858e-05 WARNING argusfrac NOT FOUND in paramIP.txt Error: illegal pointer to class object argusfrac 0x0 791 FILE:fittest.C LINE:563 *** Interpreter error recovered *** EXIT 103.510u 7.350s 1:56.15 95.4% 0+0k 0+0io 51467pf+0w. BTW, I use parameter file paramsIP.txt for parameterforscan.txt. Also I put the argusfrac values in the paramsIP.txt file so I'm not sure what's going on? C.C.