Problem installing with ArcGIS 10.4 and R 3.5.1

[fcchuang]

When I launched "Install R bindings" it showed a window in which it had a default installation and checkbox for overwrite. I did not overwrite since this was a new install and didn't know what to put in the default box so I put "3.5.1". I ran it and of course it didn't work, but the error message said "Unable to locate requested R command: C:\Program Files\R\R-3.5.1\bin\i386\Rcmd.exe". It also had the same message for Rscript.exe. So, I checked and R is installed in a different directory because it's the 64 bit version. Where its i386 in the above path, it should be x64.

How do I point it to the right directory to execute the bridge install?

Prior to install, I made sure I had the 64-bit Background Geoprocessing installed for ArcGIS 10.4. I downloaded and installed R 3.5.1 successfully. I followed all the steps for installing the bridge.