Non-appearing canvases

For some reason, I can create objects (graphs, etc) but I can’t display them. The objects are definitely there but they don’t respond to a Draw() command.
If I attempt to try a little toy array and graph that, it comes up fine, but when I run a script and then drop to the interactive mode, I can’t work with objects created in the script. Any help would be appreciated.

Send the shortest possible running script reproducing the problem and indicate which version