UMmu 1.5 hang on ingres bug report

[Peskie]

My apologies if this has been reported before (a search didn't turn up anything).

UMmu 1.5 BUGShort description:

EVA then ingress in a scenario with two UMmu capable vessels and more than 20 (or so) other vessels causes Orbiter to hang.

Severity

Serious: hangs orbiter.

Only work-arounds are:
* use only one UMmu capable vessel
* limit the total number of vessels
* never ingress ('E') a UMmu

Complete  description / Reproduce bug

Start with a clean Orbiter installation with only base+OrbiterSound+UMmu and a UMmu capable vessel (I tried with DGIV and
with XR5) installed. (To be clear; I tried this without XR5 installed so it is not an XR5 bug.)
Load one of the following scenarios.
EVA a crew member.
F3 to switch focus to crew.
Approach docking port and hit 'E'.

For me this hangs my Oribiter every time.

Scenario with DGIV: http://www.sentex.ca/~dchapes/misc/EVA%20reentry%20hang%20DGIV.scn
Scenario with XR5: http://www.sentex.ca/~dchapes/misc/EVA%20reentry%20hang%20XR5.scn
(if these links don't work try the attachments on the thead listed below on orbiter-forum.com)

Miscallenous

If I load the scenario and delete some of the excess vessels (here they are stock DeltaGliders but I tried it with other
vessels types as well) then EVA and ingress work again.  The total vessel limit appears to be 20 (depends on how accurately I
was counting).

Issue originally posted at http://orbiter-forum.com/showthread.php?t=5218


Thanks!

[Tommy]

Many other people have had problems with other add-ons, especially MFD's, when there are more than 20 vessels. I suspect the
cause lies in the Orbiter core or the API, rather than with UMMU. Dan will know better than I, but I know he's very busy
trying to get FSPX out in time for christmas.

[MattNW]

Have you tried moving the MMU vessels and astro to the top of the scenario just under "BEGIN_SHIPS". You can edit the
scenario it in notepad. That worked for me when beta testing the DGIV.