No crashes here either, sorry. I have Neb Pro Server, Reaper 32 and 64bit, EMU 0404 (which tends to have slightly buggy drivers and I still have no issues with Nebula). I know that you probably have multiple threads about this, but just for conciseness, could you re-explain your issue with as much detail as you can? Have you done any major updates lately (software, hardware, any)? Can you run Nebula at all? If so, what situation makes it crash? Are you having any other issues or quirks in your system that may be related? Your very brief statement in your post does not give anyone any info to help you with. I hope I can help, I have a similar set-up as you, it seems, and maybe we can at least track down what the problem is. Cheers.
As I pretty much only use Nebula as FX chains it crashes when I add nebula as an FX chain. I usually drop them in when audio is player so I wonder if this is the problem.
If it is, what is causing it?
I have had issues dropping in Nebula while audio is playing. I have a theory (but just a theory) that the problem is due to Reaper trying to process audio through a plugin (Nebula) while nebula is trying to convert sample rates for the samples. When I read the crash log after this happens it is always my audio driver that is reported, but this happens only when adding Nebula while audio is playing. Solution? Stop audio while I add Nebula, of course. No more problems.