Revit Error | Too Many Missing Elements

[Viveka_CD]

Hello Community!

Here is a thread on one of the most researched issues in the community.

Recently, we’ve seen reports of Revit 2017 and 2018 files failing to open or sync with “Too Many Missing Elements”.

This can be avoided by installing the latest updates to 2017 and 2018 (2017.2.3 and 2018.2 respectively). 

Please confirm if the builds are 20171027_0315 for 2017 and 20170927_1515 for 2018. If you have any other builds for 2017 and 2018 installed, you will need to update. Check the Desktop App to see if there are any Revit updates available. For information on using the Desktop App see the following article: About the Autodesk Desktop App

Note: If you are not able to download updates through the Desktop App, the following article has information on downloading updates through the Autodesk Accounts page: Install Updates, Add-ons, and Enhancements

The following article has more information:

Many missing elements in Revit 2017 model

Also see, Revit: What causes data corruption?

Regards,

[Viveka_CD · Accepted solution]

Also, quoting a good step-by-step workflow by @Matt__W below:

"This typically indicates the presence of a corrupt family or families within the model. Please try the following steps to search for, and correct, any corrupt families within your project model.

1. Open a COPY of the original model using the detach from central option then save as a new central model 
2. Save out the families. When Revit finds one that's corrupt, it will crash. 
https://knowledge.autodesk.com/support/revit-products/learn-explore/caas/CloudHelp/cloudhelp/2016/EN...
3. Make note of the family that crashed Revit (the last family will be visible on the status bar in the lower-left corner) 
4. Close Revit 
5. Reopen Revit 
6. Open the central model from step 1. 
7. Delete the corrupt family from step 3. 
8. Save the model 
9. Repeat steps 2-8 
10. Repeat until Revit doesn't crash while saving the families. 
11. Get clean copies of the original families and reload them into the ORIGINAL model and overwrite the existing families.

It's essentially the same process as outlined in the Solution section of this AKN article "Cannot open a file with audit" 
https://knowledge.autodesk.com/support/revit-products/troubleshooting/caas/sfdcarticles/sfdcarticles...

Also, below are a few links to some additional resources to help troubleshoot a corrupt Revit model.
Autodesk University 2017 - BLD125158 - Code Blue Dr Revit - How to Resuscitate Corrupt Revit Models Presentation 
http://bit.ly/2BQ38qe Watch it at au.autodesk.com

Handout from my co-presentation with @Nauman.BIMologist.Mysorewala and Datasets 
https://1drv.ms/f/s!AmO3IjYenWEdhPYvoPS5MKqY9aSjeQ"

Thanks for sharing this with the community @Matt__W

Regards,