After several attempts with my newly installed and updated R19 Studio, I was having no luck.
Then, I remembered that I still had a copy of R17 Studio on my machine. So, I attempted the same thing in the copy of R17 and it worked just fine.
I went back to R19 Studio. The original download was version 19.008. The update notice that I updated it to was 19.053.
I contacted Maxon and told them about the problem. They suggested trashing the installed and updated version of R19 and doing a reinstall. When I did the fresh install and tested it with the 19.008 version it worked just fine. But, when I updated it to 19.053, the problem started all over again.
Maxon sent me another interim update to try - 19.024. When I tested that update, the problem reappeared again.
So, it appears to possibly be a bug in these updates. Any one else having a problem with this in these updates?