ctree for suvival analysis problem

Thanks very much Achim!
I was indeed using "pec" which requires "rms"... 

I see now that the old version of pec that I used didn't require rms and
therefore I had no problem.. I'm guessing I don't need the rms methods for
my use of pec, but am not sure how I can remove the dependency or
alternatively mask back the "Surv" object to survival package. Any ideas for
that?

Thanks again!

Ofra


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