vpc under PsN

Dear all, I am new to vpc and have a basic technical question regarding the vpc under PsN to ask. Currently I am doing a vpc to validate a model, whose data was constructed in such a way that the dependent variable is log-transformed and labeled LNDV. The original model was built with data from both healthy subject as well as patients, while the vpc separated them. In the first step a plot was produced for the healthy subjects in which I found several outlier observations. This caused the 97.5% quantile of the observations to have an abnormal profile. So I tried to locate the variable, and run a separate vpc to check the influence of them. I looked up both observations in the vpctab file produced by PsN, and tried to look for the points in the model dataset. However to my surprise I did not find the observation in the dataset, whether the exact number (DV) or the ID. According to the vpc manual the ID is copied exactly from the dataset file, but the ID was also not found. Could you please help me out of this, as how to locate the points? Thanks a million for your kind help. I am attaching the command I am using in the vpc for your information: vpc final.nmctl -predcorr -lnDV=1 -dv=LNDV -bin_by_count=0 -bin_array=0.375,0.75,1.5,2.5,4,6,8.5,12,17.5,24.5,35,49,63,77,91 -stratify_on=STRT -clean=3 -seed=19860322 -samples=200 -run_on_sge -sge_queue=all.q -parafile=template.pnm -nodes=30 -sge_prepend="-pe mpich 30" Best Regards -- Xinting