Dear all, First of all, thanks for any help. I am a new R user and I am trying to do some plots using xpose 4. When I indicate to R to do this, for example: DATA CHECKOUT MENU \main\data checkout 1: Return to previous menu -> 2: Numerically summarize the covariates 3: Histograms of the covariates 4: QQ plots of the covariates 5: Scatterplot matrix of covariates 6: Check dataset 7: Observations vs independent variable Selection: 7 Then it appears this kind of error: Error in print(dv.vs.idv(eval(parse(text = ".cur.db")))) : error in evaluating the argument 'x' in selecting a method for function 'print': Error in xvardef(v, object) : trying to get slot "Prefs" from an object of a basic class ("function") with no slots Someone can tell me how to proceed? Many thanks in advance Best wishes, -- Carolina Llanos Paez PharmD, PhD Candidate School of Pharmacy The University of Queensland [[alternative HTML version deleted]]