fixed dcs freeze on cargo drop at sea.

[nighteyes2017]

Ok so my mission freezes at a certain moment and i spend about a week trying to solve why.

I finally managed to make it reproducable. Since DCS freezes totally and does not crash on its own, i cannot save a track file, nor do i have a crash log. I do have a normal dcs.log however that shows the same error on every freeze. I included the mission file so you can try yourself.

The problem occurs when a helicopter dies hauling cargo over sea. When it is shot down, crashes or dies in any way, the cargo sometimes survives. It is then underneath the surface still moving very erractically wich is visible on the F10 map view, until, after 45 to 90 seconds it shoots/flies completely of the map.

At that time, the dcs.log shows 1 of 2 errors:

APP (Main): INFINIT

or/and

FMBASE (Main): invalid double

at that time DCS freezes. but only if you are occupying a jet at the time. If you are in a gamemaster or on map view, the sim goes on.

So i made a mission file to show this strange freeze:

The mission has 2 mi26's. picking up cargo and then starting to transport it to another island.

Wait till they pick up the cargo  and fly overseas. it takes approx 2,5 mins for them to do that.

normally, for testing, you would use time accell here, but logs show this uses some sort of antifreeze??. in multiplayer or missions, you wouldnt use this, and it affects what i'm trying to show here by not freezing. so use real time.

use F10 menu to kill either one or both the mi26's.

It takes about a minute or so for the surviving cargo to fly of the map, at wich time the logs show the error and DCS freezes. (use log viewer)

If not, restart the mission. As i said, it happens when the cargo survives wich is 80 percent of the time. So you shouldnt have to try too hard to see the freeze.

you can also observe the F10 map view, and watch the strange cargo behaviour. it will move around a bit and then suddenly accelerate off the map. however if you view the map, DCS wont freeze. it freeze when you do the entire process from the cockpit view. wich is where you would be in a mission or multiplayer. 

so to see the freeze you need to be flying the f16 in the mission. just set it to autopilot and let it fly circles.
 

freeze dcs.log Island Wars 2 single 26 only .miz

[Flappie]

Hi. Thanks for your very detailed report and miz file.

I cannot reproduce the freeze, however the crate should die instantly when hitting the water. Instead it dives to an infinite depth, which is probably what triggered the freeze on your PC.

Issue reported.

 

EDIT: freeze/crash reproduced.

Edited June 4, 2023 by Flappie

[Flappie]

Although it is not in the changelog, this bug is fixed in todays OB.