

Once loaded, find an open area of your service and press CTRL+SHIFT+Right-Click and select Clear Cache.

Load your Fabrication Configuration in CADmep. To properly fix the issue, you need CADmep. This didn’t help Revit 2018 projects which do not have the Parts tab in Fabrication Settings. The prior work-around was only available in Revit 2019. A Permanent Fix (For both Revit 2018 & 2019) Once added, the Part then becomes valid in the Parts Browser. The following image shows one invalid part added to the Parts tab. To work around the issue, reload your Fabrication Configuration and individually load the invalid part in the Parts tab. That’s assuming you only have a few parts that are invalid. If you’re using Revit 2019, there is a quick and easy work-around. Quick and Dirty Work-Around ( Revit 2019 Only) Unfortunately, future database changes would often revert back to the invalid state. Reloading the Fabrication Configuration in Revit and it would be fixed. You would have to remove and re-add the part. The only known fix until recently was editing your service template. Whatever changed in Revit 2020 made it more resilient to a corrupt image cache. Revit 2020 does not experience the issue. What’s happening is that your Fabrication Configuration’s Image Cache has become corrupt. You may even notice valid parts become invalid after unloading a service or that invalid parts become valid again after loading a new service.
