[R] Error: protect () : protection stack overflow

[Bricklemyer, Ross S]

I am attempting to create a formula using as.formula for a PLS analysis.  I have used the code below successfully, but in a previous R version and with many fewer predictors.  Any help getting all of these predictors into one formula would be greatly appreciated.

TC.fmla <- as.formula(paste("TC ~ ", paste(vars, collapse= "+")))

As I mentioned, this code worked fine in a previous R version and with 2050 vars, however I now have the latest version of R and 36334 predictors in vars.

Do I simply have too many predictors for this to work, or is this an R 2.8.0 issue?

Best,
Ross

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Ross Bricklemyer
Dept. of Crop and Soil Sciences
Washington State University
251 Johnson Hall
PO Box 646420
Pullman, WA 99164-6420
Work: 509.335.3661
Cell/Home: 406.570.8576
Fax: 509.335.8674
Email: rsb at wsu.edu