UT2004. I'm pretty sure. Sequence not found errors will ocur as long as the corresponding sequence is missing, throw in a 1 frame dummy animation. I'm not sure but doesn't the doublejump lead into the floating anim? There's a jump and a float anim (float being for when your drop doesn't end with the jump animation).
I'm trying to figure out how to make my DoubleJumpX look "right". The start of the double jump works ok, but there's a hiccup in the end where it ends the double jump and apparently resumes the regular jump. Are there points in the JumpX animations where it is supposed to connect? Perhaps frame numbers? I dunno. It looks…
I think you have no responses so far because no one knows which game this is for. Quake III maybe?? Wish I could help, but I never modded that one. Might help you to re-post this, including the name of the game you're trying to mod in the thread title.