I've created a digital asset and a custom parameter that runs a python script. Basically if the toggle box is checked it moves a bone (located outside the DA), when unchecked it returns is to original position.

All nice and good if I check the box live it does what it's supposed to. However, IF I keyframe it, nothing happens. I see the box itself being checked and then unchecked (at the proper frames) but the script never runs.

Is there something I need to do in order to have the python script run when the keyframes turn the toggle box on or off?

Thank you!

Houdini's evaluation doesn't support that type of “push” operation. The way to do that is to use expressions on your bone translates that reference your toggle instead. So when the bone evaluates, it figures what values it should use based on the value of your toggle.