Another bug/annoyance that occasionally pops up, is windows that somehow are incorrectly positioned and thus not diplayed.
Also, people running into problems with special ISO character not in the ASCII character table in their path names (âccèñts / ру́сский алфави́т etc). Running the rack data dir on a MS onenote drive - or other drives somehow protected and/or managed by other software. The Rack command launch options and/or environment variables as described can be used to work around / troubleshoot filesystem related problems.