Crashes when using Opt-Shift to change MIDI ports

Cubase
1

Hello, I keep experiencing crashes when trying to change multiple MIDI tracks’ Output Port while holding Option-Shift in Cubase 15.0.30 on a Mac running Tahoe 26.6.2.

I have Cubase connected to rack instruments versions of VE Pro 8 on my host computer as well as a secondary computer–both are Macs running Tahoe. When I first load my project, I’ll get maybe a couple times changing the output port without any crashes before it finally does crash.

Things I’ve tried are: deleting my Cubase preferences and starting fresh, cleared the user cache for Cubase, and reset my key commands to the stock profile. I am wondering if there’s something I’m either doing incorrectly or perhaps a preference I need to change?

The screenshot shows the location of where I’m trying to change multiple MIDI tracks’ port. I’ve also uploaded the most recent Cubase crash.

Screenshot 2026-09-25 at 10.37.48 AM
Screenshot 2026-09-25 at 10.37.48 AM178×409 15.2 KB

Cubase 15-2026-09-25-103250.ips (210.0 KB)

2

Just off the top of my head I wonder what VST instrument is involved.

3

Hey Steve- The only instrument I’m using is VE Pro 8 (v8.1.1028)

4

I don’t use VSL these days, but for troubleshooting I would next inspect or redo the connections between Cubase and VSL

5

Thanks, Steve. I’ll give that a try.