plBiped needs a list of other includes - they are listed in the manual:


gid01.wdl, plSelect.wdl, cameraTarget.wdl, miscInput01.wdl, plBipedInput01.wdl, bipedPhy01.wdl, bipedAnim01.wdl, bipedSnd01.wdl - are they all automatically included in your project or are some missing?