I've narrowed it down to parts that are in this directory because if I go to the Product Center menu and select "Mark as Checked Out" and the part is moved to the working directory, the part is suddenly no longer lagging and moves freely with no issue. Any thoughts?This thread is inactive and closed by the PTC Community Management Team. If you would like to provide a reply and re-open this thread, please notify the moderator and reference the thread. You may also use "Start a topic" button to ask a new question. Please be sure to include what version of the PTC product you are using so another community member knowledgeable about your version may be able to assist.