https://developer.valvesoftware.com/wiki/Blender_Source_Tools_Help#Exporting

Will be fixed in the next release.

I've pushed a branch which integrates Action Slots into the import and export process. It's a core change to the addon so I'd appreciate some testing before I release it.

https://github.com/Artfunkel/BlenderSourceTools/tree/action_slots

Not sure about Python or Git? Download the code[github.com] and copy the io_scene_valvesource folder to %appdata%\Blender Foundation\Blender\4.4\scripts\addons.

Hash is a comment token. I should be able to fix this.

The data is imported, but there is a breaking API change which leaves the object unanimated. The missing step can be performed manually by choosing the "Legacy Slot" at this point in the Blender UI.

https://i.imgur.com/lquoMGX.png

Please upload the files you are working with.

This appears to be a bug in Blender itself. It's reproducible manually:

1. Enable/disable auto keying
2. Undo the last action (using the undo history to really be sure)
3. Auto keying does not change

You are not. Delete it and download it again from http://steamreview.org/BlenderSourceTools/

Update the addon.

Turing it off during export is intentional, but it should be turned back on by Blender when the export completes. Which version of Blender are you using?