Known GCDkit 6.0 installation problems and how to solve them

We have been  receiving reports recently of failed installations on both Mac and Windows. If you have the same problem, please:

• Check once more all the instructions at http://www.gcdkit.org/download
• In particular, make sure that you install R first, in appropriate version (that is 3.6.0 for GCDkit  6.0)
• If you are behind a proxy, select Internet2  option during Custom R installation
• Check that you are online before installing the supporting libraries

On Windows:

• For installation, run R with admin privileges
• If you receive a message saying that RODBC is not available for R 3.6.0:
  [1] Download the zipped version of the RODBC library from https://cran.r-project.org/bin/windows/contrib/3.6/RODBC_1.3-16.zip.
  [2] Go to RGUI menu Packages>Install package(s) from local zip files... and browse for this downloaded file on your disc. DO NOT unzip it beforehand. 
• In case you are missing any other R libraries, their appropriate zipped version can be found at  https://cran.r-project.org/bin/windows/contrib/3.6/, downloaded and installed analogously to the case of RODBC.

We do apologise for the inconvenience - the fact that  RODBC library is not correctly configured on the CRAN server is unfortunately beyond our control.

I am pleased to announce that we are just finishing a GCDkit version 6.1 that should fix a few known bugs and feature, among other things, also offline installer.

Vojtech