Arnold renderer disappeared

[tuomas.einamoV2MEV]

Started 3ds Max up today and wondered why some of the materials appeared black. This isn't unusual with 3ds Max so I didn't worry too much. Once I was finished modeling and was about to start rendering, I noticed that Arnold had disappeared completely. 

I downloaded the latest version and tried installing it again. No errors or notifications and installation was successful. Still, Arnold doesn't appear in render menu or in plugins list. 

I don't have time to reinstall 3ds Max every time stuff like this happens. How can I fix it? 

I am using 3ds Max 2025 with all the latest updates installed. 

Already tried this: 

Arnold is missing from 3ds Max or Maya

[tuomas.einamoV2MEV]

Now it happened on my other computer too. Different scene, same result. 

[JAE2005]

Hi, having the same issue since yesterday, no Arnold renderer on the list. When I opened the scene I got the following dialog box. It seems that now it does not find Arnold and asks me to change scene parameters. Hope some can help. Thanks.

 

[tuomas.einamoV2MEV]

I just reinstalled 3ds Max. Seems it has become a standard procedure at least once every new version of the program. 

[mariustipa]

Same here! Seems that every update WE need to digg and solve Autodesk problems.

[mariustipa]

There are no new versions but only new crap. Every year we got new problems to solve. I am curious if the guys took a glance at Chaos products.