I tried using the 'Reuse machining' feature between two similar parts and it failed. This has happened before so I did not bother documenting the error messages. In the past I simply retry, or close the dialogue and not use if I cannot make it work. Well this time, immediately after this happened all of my entry/exit macros suddenly died - they are not usable. I even restarted my computer and they're still dead. Nothing can convince me that this is unrelated to the failure that occurred with 'Reuse machining'. It happened immediately after.