Dear R community I have tried to run the diagnostics on my lm object with the gvlma package but it gave me an error with the following message: Non compatible arguments I post here my syntax and session info: RegreC3<-lm(Classification_Score~C3L+Age_+Dx,data=DB1)summary(RegreC3) library(gvlma)gvmodel <- gvlma(RegreC3) R version 2.13.1 (2011-07-08)Platform: i386-pc-mingw32/i386 (32-bit) locale:[1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United States.1252 [3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C [5] LC_TIME=English_United States.1252 attached base packages:[1] splines tcltk stats graphics grDevices utils datasets methods base other attached packages: [1] gvlma_1.0.0.1 Hmisc_3.8-3 WRS_0.15 robustbase_0.7-6 akima_0.5-4 [6] beeswarm_0.1.1 Rcmdr_1.7-0 car_2.0-11 foreign_0.8-44 survival_2.36-9 [11] nnet_7.3-1 MASS_7.3-13 loaded via a namespace (and not attached):[1] cluster_1.14.0 grid_2.13.1 lattice_0.19-30 tools_2.13.1 Thank you ver much Jon Toledo PostDoctoral Research FellowCNDR, UPenn Medical School [[alternative HTML version deleted]]