This issue happens only in certain revit files. First, trying to acquire license for revit takes too much time (5 to 10 minutes). After acquiring license, adding materials in the asset editor is imposible, and the program crashes. I look for v-ray support, they realized that my rvt file had almost 50 000!! instances of the Fase - existente material. I don“t have any idea of how I achieved that number of instances, but even when I purged unused materials and also after auditing my file, the problem persists.
On a side note, after purge and audit, my file size went from 100 mb to 50mb.
Thank you for the question @Anonymous!
You mention that Vray for Revit is crashing.
If you disable the Vray add-in do you continue to see this behavior, or does it only happen when using this add-in?

if its v-ray thats causing the crash then you need to go to the chaosgroups forum: https://forums.chaosgroup.com/forum/v-ray-for-revit-forums/v-ray-for-revit-bugs for troubleshooting guidance
Hi Lance,
When the add-in is disabled I don“t have problems with the file, maybe is a bit slower than other files. But the issue is when I purged unused materials, there were almost 50000 instances of a same material. I think that is mainly the cause, also v-ray forum says that the issue is related with the quantity of instances of a same material, and I couldn“t realize, till now, how all that repeated instances were there...
Thank you for the update @Anonymous!
Revit should require that materials (as well as Material Assets) have unique names. If you are finding that there are tens of thousands of materials with the exact same name, that could cause problems in Revit as well as add-ins that interact with materials.

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