[R] need help with debug package

Tong Wang wangtong at usc.edu
Thu Jan 4 06:30:59 CET 2007

Hi all,     
      I met a problem while using the debug package,  I have the following program: 

mainfun<- function(){
           y <- eval(expr, envir=list(x=c(1,2)),enclos = parent.frame())

I have no problem using this program without calling the debug package.   but once 
I mtrace(subfun),  the debugger can't find all the beta after entering subfun , and give 
the message :     "Error in beta : non-numeric argument to binary operator"

Is there anyway to get around ?

thanks a lot 
happy new year

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