[jigrael]

gave me an error in my first try, although I used step one in a 100fps scene:

Code:

-- Error occurred in i loop
--  Frame:
--   i: 1
--   objdummy: undefined
--   obj: undefined
-- Error occurred during fileIn in <File:D:\3dsmax5\scripts\ik1.5\IK2FK>
--   called in IKtoFK()
--  Frame:
>> MAXScript Rollout Handler Exception: -- Runtime error: Attempt to access deleted scene object <<
-- Error occurred in i loop
--  Frame:
--   i: 3
-- Error occurred during fileIn in <File:D:\3dsmax5\scripts\ik1.5\link>
--   called in IKtoFK()
--  Frame:
>> MAXScript Rollout Handler Exception: -- Runtime error: Illegal parent, possibly same node or ancestor node: $Mesh:FKBip01 Pelvis @ [99.962891,98.069450,57.356022] <<
-- Error occurred in i loop
--  Frame:
--   i: 2
-- Error occurred during fileIn in <File:D:\3dsmax5\scripts\ik1.5\link>
--   called in IKtoFK()
--  Frame:
>> MAXScript Rollout Handler Exception: -- Runtime error: Illegal parent, possibly same node or ancestor node: $Mesh:FKBip01 @ [99.962891,98.069443,57.356022] <<

In my second try I used 10 steps, it baked the anim but baked it wrong. Im attaching the scene.

Also I sugest that u display name of the root bone selected by parent, since sometimes I wasnt sure if I selected the right bone.

EDIT: I baked Tim´s scene and worked fine. At 5 steps