Can't 3D capture from a demo recording, how do I do it?

[jukehero461]

Hey all! Thank you so much for helping me with the last post. I finally got my demo recordings to play back, and I have the character I want, but I cannot do a 3D capture as per the instructions posted elsewhere in the forums. I even changed the key binding for the capture, but nothing happens and nothing is saved. Does anyone who might have done this successfully have an idea as to what I did wrong?