If spawning a morph target, this only works for the currently selected actor. If exporting a morph target, usually you should only export a morph target for one actor at a time, as Poser can only import a morph target for one actor at a time. If you createrd a Full Body Morph, for a character that relies on delta injection, then reloaded the original character, make sure all the relevent morphs are injected before you try to express the FBM.