When working across an entire healthcare facility and clashing combined NWDs, Navisworks may slow down to a crawl (we are talking single instance using 10gb RAM or more). Here are some tips to improve stability:

  • Make a “safe” home viewpoint inside a room somewhere, that won’t force Navis to draw the entire dataset in one window, and set some of the following as part of that viewpoint…
  • use Shaded View, not Full Render
  • Lights – Headlight
  • Don’t try and use Appearance Profiler if your dataset is large and your Appearance-related Search Sets are not at file level
  • When in Clash Detective, you can use the automatic Item 1 and 2 Highlighting instead of Appearances to visually examine clashing items
  • File Options – Clipping Planes – Near – Fixed at 0.1
  • File Options – Clipping Planes – Far- Fixed at 100 (or less if necessary)
  • Use Selection Tree instead of highly processor intensive Search Sets when possible
  • When appending a new model to an already huge dataset, you might get better results if you use the Project Browser. Import Sheets and Models -> bring the new model in and then after opening it and having a look, Append this model to your main model by right clicking in the Project Browser

Finally, I have found Navisworks 2015 to be much smoother and more reliable than previous versions. You can upgrade to 2015 and still downsave to 2013 for projects that require you to do so.

    Let’s say something went wrong, and you have lost an NWC file that you need – but you don’t have access to the originating application or model.  Do you have an NWD file that contains this NWC, preferably a recent one?  Then you should be able to re-create that NWC file, which might get you out of trouble in the short-term.

    1. Open the NWD in Navisworks
    2. In the Selection Tree, select the branch that equates to the NWC you want to regenerate
    3. Hide Unselected
    4. Turn off Sectioning (if you want to make sure you get all of the geometry, uncropped)
    5. Export to 3D DWF or 3D DWFx
    6. In another instance of Navisworks, append that DWF.  Navis will automaticlly make an NWC file.
    7. Rename the NWC to match the one that you have lost
    8. Append or re-path it back to your main NWF file

    You will probably have to notify someone that this NWC is now somewhat orphaned or disconnected from normal workflows – but I’ll leave that side of it up to you 🙂