Hello, we are sorry you are experiencing issues with our game.
Could you please export your game log files from the launcher?

Steps on how to export logs from ARMA 3 Launcher:

1. Start ARMA 3 Launcher
2. Click the Hamburger menu tab in the launcher (Top right corner. Next to Options (Cog wheel icon) and Minimize Button)
3. Drop down menu will appear
4. Select: Prepare Arma Troubleshooting error and save those files
5. A notification will pop up with the name of the generated file

Please note that the files might take a while to collect.

Attach the generated files to the ticket. If the files are too big please use some free file sharing service.

It appears to be mod related. I will upload the Log files just in case

This is not mod related.
It is 100% reproducible. Pressing either a function key or the '^' for selecting your whole team crashes the game.

The bug appeared with the dev build from 19. Nov. 2015, and is still reproducible with todays build.

You're right, after spending a good few hours trying to figure out what mod was doing this and checking for conflicts it's still happening, although not running some mods made it more randomly crash rather than every time

Now it only happens with certain missions. I will upload one more log and the test mission.

You may try the mission I uploaded. With that mission I can reproduce the crash consistently:

• Start the mission by previewing in 2D editor
• After the mission has started press 'F1' or another function key.

Can confirm that its repeatable on the version released on the 21/12/15 (australain)

Should be fixed on Monday

Fixed.