Thanks, @Jack. There aren't any colons or slashes in the file names. I just updated to the latest OS, but it made no difference. If I paste to ver 3.14.1 the prog works. If I paste to ver 4.0, it doesn't run. If I go to the source folder and double-click the .command shell or the exe then the program runs just fine. It's just from within the IDE that certain progs don't seem to wanna run. A renamed version of the program just ran for me, but didn't a minute ago. I think I have Gremlins!
Edit: So maybe the IDE is treating my F5 requests like F11s (Make EXECUTABLE only) sometimes? It's not the end of the world, but is strange...
Edit: So maybe the IDE is treating my F5 requests like F11s (Make EXECUTABLE only) sometimes? It's not the end of the world, but is strange...