[R] Problem loading aplpack library

[Tom Wright]

Assuming you are on a mac this link may be of assistance:
http://tips.tutorialhorizon.com/2015/10/01/xcrun-error-invalid-active-developer-path-library-developer-commandline-tools-missing-xcrun/

On Wed, Jun 8, 2016 at 7:14 PM, David Howell <david.howell at uvm.edu> wrote:
> I am having trouble running aplpack on my Mac. It will run on my PC, but the
> Mac gives an error message. Below is the result that I obtained.  It seems
> to install fine--see below--but I can't load the library.
>
>
>  > install.packages("aplpack")
> trying URL
> 'http://cran.rstudio.com/bin/macosx/contrib/3.1/aplpack_1.3.0.tgz'
> Content type 'application/x-gzip' length 3157548 bytes (3.0 Mb)
> opened URL
> ==================================================
> downloaded 3.0 Mb
>
>
> The downloaded binary packages are in
> /var/folders/6m/t4wvnh9x39500z_rh3p5jlk00000gp/T//Rtmp26I5Ej/downloaded_packages
>
>  > library(aplpack)
> Loading required package: tcltk
> xcrun: error: invalid active developer path
> (/Library/Developer/CommandLineTools), missing xcrun at:
> /Library/Developer/CommandLineTools/usr/bin/xcrun
>
> It looks as if it has a problem with tcltk. I can install tcltk2, but when I
> try to install tcltk it tells me "package not found. Is that the problem
> that aplpack is having when it tries to load the library?
>
> Any suggestions?
>
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