# broken backward compatibility with VrayMultisubTex **URL:** \ **Category:** Issues\ **Created:** [February 15, 2022, 5:45am UTC](https://forums.chaos.com/t/broken-backward-compatibility-with-vraymultisubtex/108868 "2022-02-15T05:45:55Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![justini](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/justini/32/22033_2.png) [@justini](https://forums.chaos.com/u/justini)\ **Post date:** [February 15, 2022, 5:45am UTC](https://forums.chaos.com/t/broken-backward-compatibility-with-vraymultisubtex/108868/1 "2022-02-15T05:45:55Z")
Therre’s an issue with the VrayMultisubTex map whereby the map loses it’s selected options after opening the file with an older version of vray 5. For example, I had set up a material uising a VrayMultiSubTex random parameter set to “by element”. A colleague who didn’t have the most recent updates installed opened the file and resaved it. When I opened that file again, I discovered this map no longer had “By element” selected any more. On closer inspection it seems that the interface for this map has changed slightly in recent updates, and as a result backward compatibility has been lost. ---
**Author:** ![vladimir\_krastev](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/vladimir_krastev/32/42177_2.png) [@vladimir\_krastev](https://forums.chaos.com/u/vladimir_krastev)\ **Post date:** [February 15, 2022, 10:16am UTC](https://forums.chaos.com/t/broken-backward-compatibility-with-vraymultisubtex/108868/2 "2022-02-15T10:16:52Z")
Hi, V-Ray is developed in such a way that if you open a file created in an older version it works with the newer version. If you created a file in the newer version and you try to work with it on the older version we can not guarantee this will be trouble-free. It is best if you could update all your team’s V-Ray versions to the latest one available on our [download page](https://download.chaos.com/?license_type=adv&platform=49&platform_version=256&product=47). ---
**Author:** ![yavor.rubenov](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/yavor.rubenov/32/2946_2.png) [@yavor.rubenov](https://forums.chaos.com/u/yavor.rubenov)\ **Post date:** [February 15, 2022, 11:30am UTC](https://forums.chaos.com/t/broken-backward-compatibility-with-vraymultisubtex/108868/3 "2022-02-15T11:30:00Z")
In addition are you using the latest V-Ray version from our site - V-Ray 5 for 3ds Max, update 2.2 released on 16.12.2021 ? One of the older builds had indeed an issue with VrayMultisubTex backwards compatibility (internal ID VMAX-11542). ---
**Author:** ![justini](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/justini/32/22033_2.png) [@justini](https://forums.chaos.com/u/justini)\ **Post date:** [February 15, 2022, 2:32pm UTC](https://forums.chaos.com/t/broken-backward-compatibility-with-vraymultisubtex/108868/4 "2022-02-15T14:32:49Z")
> [@yavor.rubenov](#): > > In addition are you using the latest V-Ray version from our site - V-Ray 5 for 3ds Max, update 2.2 released on 16.12.2021 ? One of the older builds had indeed an issue with VrayMultisubTex backwards compatibility (internal ID VMAX-11542). Yes. we are all updated to the latest one now, but one of the team was using an older version. I believe it was Build 5.10.01. Which build had the backward compatibility issue fixed? I couldn’t find anything in the changelogs regarding this. ---
**Author:** ![yavor.rubenov](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/yavor.rubenov/32/2946_2.png) [@yavor.rubenov](https://forums.chaos.com/u/yavor.rubenov)\ **Post date:** [February 15, 2022, 2:37pm UTC](https://forums.chaos.com/t/broken-backward-compatibility-with-vraymultisubtex/108868/5 "2022-02-15T14:37:20Z")
The changes happened in Update 2. If you are using any of the new random modes or a combination of them - this is no longer backwards compatible. ---
**Author:** ![justini](https://dub1.discourse-cdn.com/chaosprd/user_avatar/forums.chaos.com/justini/32/22033_2.png) [@justini](https://forums.chaos.com/u/justini)\ **Post date:** [February 16, 2022, 3:51am UTC](https://forums.chaos.com/t/broken-backward-compatibility-with-vraymultisubtex/108868/6 "2022-02-16T03:51:48Z")
> [@yavor.rubenov](#): > > The changes happened in Update 2. If you are using any of the new random modes or a combination of them - this is no longer backwards compatible. ok, but why wasn’t this noted in the changelog?