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No. Can be minutes between any action and the crash.

As I wrote earlier, it is completely random, it can happen at any time, not just OMS-2. Had it happen during first stage ascent, second stage ascent, during +X translation post-ET sep, configuring switches, you name it.

Negative. No change whatsoever.

No. It is completely random other than it requires a prelaunch scenario start. That's it.

Not that I have experienced as of yet. It's this as of yet unexplained sudden exit that only occurs when using a prelaunch scenario. No way to predict when it will happen, just that there's an chance of it happening.

Tried the latest nightly build of Orbiter-x86 and no change. Still crashes.

And that the logs are useless is a known issue which is documented here as an official issue report: github.com/orbitersim/orbiter/issues/382

Now I checked off the entire the list. Nothing have an effect.

The only things on that list I haven't tried is the lights and the launch site.

Logs were posted here: https://www.orbiter-forum.com/threads/space-shuttle-vessel.37856/post-636592 and the post below it.

Nothing special in the logs. This is the post where I first reported it: https://www.orbiter-forum.com/threads/space-shuttle-vessel.37856/post-636422

No joy on v1.11, same CTD during the OMS-2 burn.

And downgrading to even v1.13 yields no change in the CTD behavior.

Removing the xenon lights make no difference.

This is now something that is beginning to irritate me a lot. Is there anything I could on my end to help trace this down? And so far it only happens if I start with a pre-launch scenario. If I start with an on-orbit scenario, everything is very stable and good.

That was an early Demonstration Motor (DM) of the SRM design intended replace the current shuttle SRMs when they have used up that inventory, called the Booster Obsolescence Life Extension (BOLE) booster. They have enough in the inventory to last until Artemis 8.

Orion uses the Space Launch System (SLS) which uses very different and much larger SRBs. No crew vehicle is assigned to Vulcan at this time.

Noticed that you have an SSRMS Power and Data Grapple Fixture (PDGF) there. Should be a Flight Releasable Grapple Fixture (FRGF). All dimensions are in inches. https://www.dropbox.com/scl/fi/iqrso2s4uivoh4jbx8pki/FRGF_schematic.jpg?rlkey=4c0ryqm7rvv64efud66881eeq&dl=0

It was at 895.93 (PL ID 227). The position was based on photographic analysis only.

I think that the lateral offset for the keel cameras are incorrect. According to my information, they should be offset 4 inches (0.1016 m) to the left. While the axis is correct, the offset is not. The attached screenshot shows this, the keel camera target is located exactly 4 inches to the left...