Splitting Animations

I’m currently experimenting with Raw Mocap data that I got from Carnegie Mellon, and the animation totals 81 seconds long (all one clip). I (think I) know how to split animations, and was practicing on this, but whenever I add a new animation and try to specify the range, it only lets me specify a max “end” value of 249. See picture here: Upload and share screenshots and images - print screen online | Snipboard.io. Am I doing something wrong?

Thanks… just getting a little frustrated because I can’t figure this out. Any help would be appreciated…

Edit: The animation is a .BVH file, if it matters.

It seem that you have multiple take in this file as seen on your picture: Default Take, 01_02.

Look like your animation data is on take 01_02 which goes from frame 992 to frame 4345 which is roughly 110 second of animation