R TCLTK未在Windows上加载

Question

I have installed R on countless windows machines and never had a problem with the tcltk package until now. I have freshly installed R 3.3.2 onto Windows 10 Pro v1607 and can't load tcltk. I used the windows install binaries from CRAN, so no custom builds.

capabilities("tcltk")

returns TRUE. When I try to load tcltk:

library("tcltk")

I get:

Error : .onLoad failed in loadNamespace() for 'tcltk', details:
  call: inDL(x, as.logical(local), as.logical(now), ...)
  error: unable to load shared object 'C:/Program Files/R/R-3.3.2/library/tcltk/libs/x64/tcltk.dll':
  LoadLibrary failure:  The specified module could not be found.

Error: package or namespace load failed for ‘tcltk’

Navigating to the location of the DLL confirms that it is there. This fails when calling both x64 and i386 versions of R. I have tried running as admin and same thing. I also tried rolling back to version 3.3.1 and had the same issues.

This PC has an AMD FX-8120 processor.

I couldn't find much on R tcltk problems on Windows. Any ideas would be great. Cheers

EDIT: added info:

R version 3.3.2 (2016-10-31)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows >= 8 x64 (build 9200)

locale:
[1] LC_COLLATE=English_Australia.1252  LC_CTYPE=English_Australia.1252    LC_MONETARY=English_Australia.1252 LC_NUMERIC=C                      
[5] LC_TIME=English_Australia.1252    

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

loaded via a namespace (and not attached):
[1] tools_3.3.2

Answer 1

To fix the problem do the following tests:

Test the Tcl/Tk installation of R:

1. Find and start wish85.exe which is contained in one of the sub folders of the R installation ("85" is the version number and my differ depending on your R version).

2. An empty Tk window must pop up and a tcl/tk console must open. If not the installation is damaged or parts have been deleted (reinstall it)

Check if R is using the right Tcl/Tk version:

1. Check the value of the environment variable MY_TCLTK

2. If it is defined: Does the path point to the bin folder of Tcl/Tk? If not: Fix it.

   If it is not defined: It should work out of the box but you could set the value to the bin folder.

Source:

https://mirrors.dotsrc.org/cran/bin/windows/base/rw-FAQ.html#Package-TclTk-does-not-work_002e

Answer 2

MY_TCLTK was defined as "Yes" in my environment variables. I changed it to the location of the tcl exe that was installed with R and it works now.