Min RK

Sorry, missed that part. Automatic restart could possibly also be achieved through the on_stop callback. The question becomes whether it makes sense to _restart_ the same engine set vs starting...

The SSH launchers are piping to a file and have a `get_output()` method. This seems to be working well, and we can promote it to the base lanucher and e.g....

Sorry I missed this. That's certainly a strange error I haven't seen before. Can you share `pip list` and the OS, Python version? Do you have any configuration files in...

What's the exact Python version on every machine?

Hm, the unknown opcode generally comes up when the client and engine are different Python versions. Maybe it's a linux => windows problem?

This should be not only more rigorous, but *faster* because we can wait for the actual event: everything is connected, rather than needing to set a long heartbeat and/or registration...

This should be doable. For argument parsing reasons, it would probably be `%%px --push a,b --pull c`. I assume this would require that `a` be pushed as `a` and `c`...

I'm not sure how easy this is right now, but we should probably add an 'abort_if_possible` that aborts only if it isn't done, since this kind of use case is...

Hangs are really hard to debug. It is suspicious to me that you have all reported the issue on Windows, which makes me think there is some kind of resource...

Thanks for that sample! That suggests that it is *not* fixed by #464, because that was purely a client-side race. If this is reliably reproducible for you, can you share...