Can anyone explain to me how removing motors from a motion study would cause errors in the study?  i have a motion study that has approximately 70 motors in it.  we wnat otdo a video of only one section of  the machine, so i copied the large motion study, and started removing motors that we don't need. now, in a 30 second clip, i have close to 20 seconds of "RED" in the time line.  how is this possible? how, by removing constraints (motors), do i  more errors?  shouldn't there be less conflicts now that there are less motors?