I'm a little surprised that no one else has encountered this. I was experiencing intermittent errors when trying to deploy an image to a controller. More often than not, deployment would report an incompatible chassis. In the RAD source, I tracked it to a bug in the function that extracts the system image to the user's local temp folder. There is parallel execution where a folder path is deleted while at the same time files are attempted to be copied to that location. Making these operations sequential seems to resolve the issue.
This issue was reported in Github here: https://github.com/ni/rad/issues/6
One of the major challenges is that NI R&D does not support the RAD utility and issues like this are expected to be resolved by the community.
Either I was never aware or had forgotten that RAD was on Github. Had I known, I would have submitted a pull request when I made my fix. When doing a search for NI RAD, this is one of the first results to appear. It provides a link to download the source, but makes no mention of the Github repository.
You are right! However, I think R&D is no longer accepting pull requests on the RAD code.