: By: Derek Moran; In: FAQs; Published: 13 August 2020; Last Updated: 07 August 2023

Q: Vegas Pro or Vegas Movie Studio crashes when opening the Render As window and creates an Unmanaged Exception.

Answer: This problem is normally caused by a fault with a Windows 10 program called .NET Framework, that Vegas uses to make the Render As window work. By resetting .NET Framework, you should be able to fix this crash in Vegas Pro or Vegas Movie Studio.

This morning I was greeted by an old chestnut when trying to render a video with Vegas Pro 18. Every time I tried to open the Render As window, Vegas Pro 18 would crash. I then opened many older versions of Vegas Pro and they were all still working OK without crashing.

When Vegas Pro or Vegas Movie Studio crashes, the Problem Report window will open and tell you what caused the problem. Make sure to check the box that says Show problem details and it will indicate were you should start looking.

unmanaged exception kernelbase

What causes this problem?

There are three separate issues I know of, that can cause this problem:
1. .NET Framework not working correctly
2. Intel Integrated Graphics (older versions) are not compatible with latest versions of Vegas Pro.
3. plugin_manager_cache.bin in the VEGAS Temporary Files Folder

1. .NET Framework

I believe the cause of this problem was due to some of the latest Windows 10 Updates that were just released, because before I installed these updates, Vegas Pro 18 was working perfectly OK. It was only after I installed these updates that Vegas Pro started crashing.

I am currently using the latest version of Windows 10 - Version 2004, OS Build 19041.450
In the last couple of days, Windows released some updates for:

.NET Framework 3.5 and 4.8 (KB4569745)
Cumulative update for Windows 10 (KB4566782)

You may be reading this FAQ in the future and Windows has released yet another update for .NET Framework. I have seen the same problem for many years every time Windows updates .NET Framework.

Solution - How to Fix

Go to the Windows Control Panel and open Programs & Features
If you don't know where Control Panel is, simply type "Control Panel" in the Windows Search box next to the Windows Start button and select Control Panel from the results.

In the top left corner of the Programs & Features window, select Turn Windows Features on or off.

turn windows features on off

The following window will open.
Deselect .NET Framework 3.5 (includes .NET 2.0 and 3.0)
Be patient and wait for Windows to do it's thing...

windows features off

Once it is finished, open the same window again and turn .NET Framework 3.5 (includes .NET 2.0 and 3.0) back on.
It may ask to download files - say yes and be patient...
Turning this back on will force a refresh and re-boot of .NET Framework 3.5 (includes .NET 2.0 and 3.0).

windows features on

Finally, re-boot computer then open Vegas and test the Render As window.
Hopefully it is now back to normal.

2. Intel Integrated Graphics (older versions) not compatible with Vegas Pro

If resetting .NET Framework did not fix the Render As crash problem, check to see if your computer is using a old version of Intel Integrated Graphics.

Vegas Pro and Vegas Movie Studio Platinum, work best with a dedicated Nvidia or AMD Radeon graphics card. On many laptops and some desktops that use an Intel CPU, there is also an integrated GPU which is part of the CPU. Older versions of this GPU, can also be responsible for Vegas Pro crashing when you try to use the Render As function.

There are two things that you need to do. First make sure your computer is using the dedicated Nvidia or AMD Radeon graphics card and not the more basic Intel graphics. Then you need to disable the Intel graphics.

To disable Intel graphics, type "Device Manager" in the Windows search box next to the Windows Start button and select it from results.

Open Display Adapters, right-click the Intel GPU and select Disable Device.

Make sure to leave the Nvidia or AMD Radeon graphics enabled, because this will now be your primary device.

3. Delete "plugin_manager_cache.bin" in the VEGAS Temporary Files Folder

I haven't been able to verify if this solution works myself, however another user left a comment below and claims this is something users should try. It definitely can't do any harm, by following these instructions!

Instructions - Part 1

Please note: Before you can follow these instructions, you will need to make sure you can "see" hidden files and folders in Windows. By default, the AppData folder is a hidden folder in Windows. To see "hidden folders", you will need to change a setting in Windows.

Windows 11 users do this

Open File Explorer (Documents) and press three dots at top of window.

windows 11 explorer settings 1

Select Options

windows 11 explorer settings 2

Go to the View tab and select Hidden Files, Folders and Drives

windows 11 explorer settings 3

Windows 10 users do this

Type "Control Panel" in the Windows Search box and select Control Panel to open it.

Select File Explorer Options

Go to the View tab and select Hidden Files, Folders and Drives

windows 11 explorer settings 3

Instructions - Part 2

Now that hidden folders are visible in Windows, you can continue...

Go to C:\Users\**Your User Name**\AppData\Local\VEGAS Pro and select the version of VEGAS you are using.

Find plugin_manager_cache.bin and delete it.

Now see if you can open the Render As window without it creating an Unmanaged Exception.

Please note: The next time you re-open VEGAS Pro, plugin_manager_cache.bin will be automatically recreated.

14 Comments
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Don't Do Those Steps ^^ · 16:20 12/07/2023
FIX: go to users/YOU/appdata/local/vegas pro/version/ and DELETE plugin_manager_cache.bin ... That fixes it every time for me. I'm on v18.
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hello · 07:10 01/06/2023
the first time I turned it off it asked for a reboot. I rebooted and now I am turning it on. hope this works.
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Jake · 18:12 27/01/2023
Hi, I'm having this issue recently, the net fix didn't work and before and after i switched graphics cards I never had intel. I've done a clean install and have even gone back from vegas 17 to vegas 16 to see if that would work, but no dice. Any ideas?
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  Derek
  
  Member
  
  Moderator
  
  · 13:20 30/01/2023
  
  Hi Jake
  If you have recently changed Graphics Cards, the problem will be caused by parts of the old Drivers causing confusion with Vegas Pro.
  If you would like help with this, post a message on my forum and I can give you some more suggestions.
  The forum is better place to ask questions, because I can upload screen shots if needed.
  https://www.moviestudiozen.com/forum
  If VEGAS is producing an error report, please upload copy of what the error report says - it will help find the problem.
  Regards
  Derek
  
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Logan.209

Member
· 15:03 14/08/2022
Hello, I tried both of these and neither worked. The problem started after I upgraded my graphics card and I'm also waiting on a new processor as well, since my current one is pretty old, so I'm not sure if that would have anything to do with it. Is it possible that having a newer graphics card with an older processor might be causing this to happen?
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  Derek
  
  Member
  
  Moderator
  
  · 12:21 15/08/2022
  
  Hi Logan.209
  Since you have created a new account, I recommend you copy and paste your message above into the MSZ Forum.
  My forum is a better place to Q&A back and forth - more room to reply and other users can help as well.
  https://www.moviestudiozen.com/forum
  I have some ideas for you, but I'll expand further once I see your message on the forum.
  Short answer = Newer graphics cards are BETTER, however I need to know what make and model your Graphics Card is.
  There are also numerous settings I need to know about...
  I'll post a more detailed reply on the forum for you.
  Regards
  Derek
  
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RedForShort

Member
· 09:34 03/06/2022
I tried posting in the forum but whenever I click to start a new post OR reply to an existing post, an error screen shows up.
For now, I've got a workaround... for anyone reading this... right click the Vegas icon on your desktop. Click Properties, then click the Compatibility Tab. Then select the checkbox that says 'Run this program in compatibility mode for'. Windows 8 should be in the dropdown box. Cool. Click Apply and then it should work 🙂👍
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  Derek
  
  Member
  
  Moderator
  
  · 13:40 03/06/2022
  
  Hello RedForShort - I am the website and forum moderator.
  The forum is working 100% OK - I just did a check and there are no errors. Other users have also posted messages in last 24 hours with no problems.
  If you did not accept the Cookies Permissions message (for forum) at bottom of screen and/or use an Ad Blocker, that will stop the forum from working correctly and produce an error.
  Also, for new members your first message will be held in moderation (not made public) until I check it and approve it, to make sure you're not a spammer.
  I would recommend you clear/delete your web browsers History and Cookies, and then attempt to post a message, next time you want to.
  
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James · 03:41 02/05/2022
i tried the first solutiona dn it didnt do anything. i dont have an intel processor so the second issue is non existent but. the exact same thing keeps happening no matter what version of vegas im on
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  DoctorZen
  
  Member
  
  Moderator
  
  · 16:53 02/05/2022
  
  Have you tried doing a full program reset ?
  Reset instructions here:
  https://www.moviestudiozen.com/doctor-zen-faq/573-how-to-reset-sony-software-to-default-settings#a1
  Does Vegas Pro produce an error report ?
  If it is producing an error report, that should tell what is causing the problem.
  Tick the boxes that say something about providing more information and copy all data inside of white box.
  Post a message on the MSZ Forum and paste copy if error report inside of the message.
  Then I can inspect error report and go from there.
  https://www.moviestudiozen.com/forum/index
  Regards
  Derek
  
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Aditya Godara · 20:06 14/04/2021
didn't helped me at all. I now can't install .net framework again and it is showing error as many times i do it! Delete this post. It will be good for us!
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  Derek
  
  Member
  
  Moderator
  
  · 07:55 15/04/2021
  
  There is something wrong with YOUR computer if that is happening!
  Turning on/off .NET Framework is perfectly safe to do - Microsoft officially will tell you the same instructions.
  I recommend you do a clean re-install of Windows 10.
  
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MB · 05:46 04/01/2021
Thanks for the tip; I'm sure the problem is something to do with .NET but this fix didn't work for me. Still trying, and have filed a support request with Magix.
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  Derek
  
  Member
  
  Moderator
  
  · 16:07 04/01/2021
  
  If the error report looks different to the one in this article, post a message on my forum and upload a copy of your error report. There may be something completely different going on, that I can help you with.
  Make sure to describe exactly what the problem is and which exact version of Vegas you are using.
  To post on the MSZ Forum, press login button, then Create an Account.
  https://www.moviestudiozen.com/forum/index
  
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