Collineariy Diagnostics

Hi, and thanks for your help

in order to do collinearity analysis I downloaded the perturb package. I run
a lm (regression) and on that the ??calldiag?? commad to get condition numbers
but i get the following message: the variable XY with modus ??numeric?? was
not found (it does the same with all predictors despite all variables are
numeric and exists).

Can anyone tell me how can I go arround this problem? Is there another way
to have ??condition numbers??? What about VIF?

Please return message to: antoine at ruetter.ch

Thanks a lot

Antoine