I am having a problem where a parameter previously assigned to a Rig show as assigned even though I have deleted all rigs from my project. Issue is that I cannot reassign that parameter for a given layer to a new Rig. Is anyone else experiencing this problem?
I wanted to offer up a solution for this bug as it happened for me today. First this is not for the faint of heart, so backup before you start and in a lot of cases it could just be easier to delete the object and redo it. In my case I had a lot of other rigging already done to different parameters on the same element and I would have basically had to start over. So I opened up the .motn file in a text editor (I used TextWrangler) apparently its just one great big xml document. So I searched for "Rig Behav". This will jump you from one Rigged Behavior to the next but if you should be able to figure out what object it is applied to by following it up the tree up as well as what type of parameter your wanting un-rig. So mine was a rotation so when I ignored any Rigged parameters that were position or birthrate or anything else but rotation. Then I deleted everything in-between the <behavior> </behavior> tags. This worked for me and might help others out.