Having multiple armatures on the same exportable is unsupported, as it allows behaviours that Source doesn't support and also opens up all sorts of complications with regard to bone names etc.

The bug was that this wasn't detected between grouped objects. Now you will receive a user-friendly warning when you try to export your scene.

To fix this, use one Armature for everything. By using bone layers and groups you should be able to achieve everything you need with one object.

You can still have whatever parenting system you want...just don't use Armatures for it. :)

This is now fixed.

Just fixed this.

Your QC is loading a file called kirklegs.dmx, not kirk.dmx. You also have no idle sequence. Once I fixed those issues the compile succeeded.

OK, I'll take a look.

This is an issue with your model, not the exporter. This is the line that matters:

ERROR: Too many bone influences per vertex!

You can either fix this in the model or use the exporter's "Weight Link Cull Threshold" setting.

A flex controller can control multiple shapes; see the definition of DmeCombinationInputControl. (You'll need to use advanced flex controller mode, of course.)

I've no idea whether that applies to flexes across multiple studio inputs. You may find that what you want simply isn't supported.

You can copy the error to the clipboard from the system console. Use Window > Toggle System Console in Blender to open it.

Can you upload your blend file, or at least a test case which reproduces the problem?

I'm seeing the problem. I'll fix it when I get a chance.