Massive X seems to be often crashing Ableton 11; mostly reproducible

Question

I have a large (>=75 tracks) Ableton 11 project that seems to hang upon unloading (switch projects or quit Ableton) only if I have one more instances of Massive X in the project.

Everything - including all plugins - is updated, activated, etc. 64GB of RAM, M5 Pro processor. CPU is nowhere near topped out.

In addition, when this hang happens, the Ableton Edit menu indicates that I can undo an edit wherein I changed a Massive X macro - but I never changed a macro or even opened a Massive X macro in that session.

For short sessions, the project doesn't hang on exit, nor do I see the bogus edit.

The general pattern is reproducible; I can prevent the hang from happening by removing all Massive X instances from the project. (There are lots of other plugins; all seem ok, and removing them has no effect on the hang.)

I'm happy to provide Ableton crash logs and status reports, etc.

Penrose Bunnington · Answer

@Jeremy_NI   ,

Thanks. I'm taking some time each day to try to produce roughly the smallest project where the problem happens fairly consistently. I hope to have that ready to send in the next two to three days. I also sent crash and status logs to Ableton, and from what I can gather from their reply, they suspect Massive X is at least a culprit if not the culprit (it could be some interaction of factors).

Jeremy_NI · Answer

Are you able to reproduce the issue in another project? If you could reproduce this in a small project you could then share it with our support so they can try and reproduce the issue. Please get in touch with our support if you wish to make a bug report, please include all necessary files, crashlogs, screenshots you see fit. Here is where to go:

https://support.native-instruments.com/support/home