These motion files are also called clips.
To rectify this, open the Asset Tracking dialog and set a new path for the files. The Motion Mixer allows you to mix motion files (BIP filesand XAF files) for any biped or non-biped objects. If these paths are broken (for example, if the BIP files have been moved or renamed), a Missing Motion Mixer Files dialog or Missing Motion Flow Files dialog, respectively, opens listing the missing files. When you save a Motion Mixer (MIX) file or a Motion Flow Editor (MFE) file, the paths to the referenced BIP files are also saved.
See Filtering Motion-Capture and Marker Data. Refer to the Installation Guide for more details. There are several ways to create or acquire. IK objects, props and other objects in the scene can also be saved with the BIP file.
IK Blend values for the keys and Object Space settings are also saved. They save all information about biped motion: footsteps, keyframe settings including limb rotation, the scale of the biped, and the active gravity (GravAccel) value.
