Out of the blue my devtools package will not work. Here is what I get. I have tried numerous fixes on my Windows 8 machine. I have reinstalled Rtools, I have reinstalled devtools but I keep getting the follwoing
require(devtools)
Loading required package: devtools
Error in namespaceExport(ns, exports) :
undefined exports: iteratelist, rowSplit, whisker.escape, whisker.render
Where do I begin?
Winston Chang over on the devtools github said, "Strange, those errors involve the whisker package." So at his behest I am providing some additional information.
> packageVersion('whisker')
[1] ‘0.3.2’
> packageVersion('devtools')
[1] ‘1.3’
> sessionInfo()
R version 3.0.1 (2013-05-16)
Platform: x86_64-w64-mingw32/x64 (64-bit)
locale:
[1] LC_COLLATE=English_United States.1252
[2] LC_CTYPE=English_United States.1252
[3] LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C
[5] LC_TIME=English_United States.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
I found a solution. I deleted the whisker folder in ~My Documents\R\win-library\3.0\ and reinstalled the package. Everything worked.
Thanks to Winston Chang who made me realize that my devtools problems were coming from the whisker package which I believe devtools relies on. Thank you to @DWin who gave me the idea of chucking out a malfunctioning library and reinstalling the library.
It was when I issued library(whisker) that I realized the problem may not be with devtools at all but rather with whisker
> library(whisker)
Error in namespaceExport(ns, exports) :
undefined exports: iteratelist, rowSplit, whisker.escape, whisker.render
Error: package or namespace load failed for ‘whisker’
I can now load devtools and whisker.
It is odd. I would have thought that my packages would have been reinstalled when I uninstalled R and reinstalled it (one of the desperate steps I took when I was trying to troubleshoot). Evidently ~My Documents\R\win-library\3.0\whisker survived the uninstallation. Clearly I need to learn more about R installation and the ways in which the libraries can be setup.