@Serbitar I suspect that pausing from a tool change macro is going to cause problems. I'm not even sure what the correct resumption point should be if you do that. Having said that I've also no idea what the correct way is to handle a failed tool change. I tend to treat them in effect as a fatal error on my e3d toolchanger and just abort everything, but I can see how on printers that may have "expected" fails during a change this is not really a good solution.