I would check but everytime I click 'Render As...' it crashes immediatley

When it worked before, try first to do a full reset of the program following this : https://www.vegascreativesoftware.info/us/forum/faq-how-can-i-reset-vegas-pro-to-default-settings--104646/

Nope, still crashing, even after doing that

My last idea, look if there was since the last time it went well a Windows update that changed things as installed driversor so.
If there was and you can roll back to a restorepoint before the change, try it.

I got that error all the time. Then one day I didn't get the error. I noticed that when I could get the Render dialog to open without error, there was an HEVC media in the media bin (1920x1080). Then I discovered that as long as an HEVC media had been in the media bin, I could continue without it in the project, and the Render dialog would open up anyway without error. I also found that as long as I didn't exit Vegas Pro 18, I could create additional projects without the need for the HEVC media to be in the media bin again. Somehow, the first instance of an HEVC media in the media bin after Vegas Pro 18 opens triggers an action that allows the Render dialog to open -- for at least me.

Well that's strange, My vegas wont even accept HEVC video clips,

@JoshiStitic - This isn’t good. OK, Start a set/series of Aggressive/Regressive Testing.

1) Reboot PC

2) Start a fresh VP Project in Factory Reset.

3) Name it Test1

4) Close VP.

5) Restart PC.

6) Open Test1.

7) Select one short piece of Video Media, acquire and take note of its MediaInfo and ADD to Timeline.

8) Have VP MATCH your Project Settings to THAT Media. Do you know how to do it?

9) Save Test1.

10) Close VP.

11) Restart VP and open Test1.

12) Now, try to Repro your Error. What happens?

G

By reboot PC do you mean remove everything and reinstall windows or restart?

By reboot PC do you mean remove everything and reinstall windows or restart?

Restart.

Ok so i did what you asked and the exact same thing happened: Unmanaged Exception, same error code too: (0xe0434352)

The media Info is here:

Format: MP4 Video File (although, strangely, when importing it, Vegas decided to install an MPEG codec)

Length: 10 Seconds

Frame Width: 360

Frame Length: 360

Data Rate: 182 kbps

Total Bitrate: 256 KBPS

Framerate: 22 fps

Audio Bitrate: 73 kbps

Channels: 1 (mono)

Sample Rate: 44.1 khz

We are getting somewhere.

Q1 Did you match the Project to the Media?

Q2 What are the Project Settings Now?

Q3 Did you use MediaInfo Utility to acquire the Media Information?

Q4 What Device/Camera did you use to acquire that MP4?

Q1 ans: Yes, the way i did it was when i put the clip in it sent a dialogue asking me if i wanted to do that, and I clicked yes.

Q2: My project settings are: 360x360x32 @22.000p

Q3: No, i used VLC media player to find the media information

Q1 - Use the Project Settings Match Media Button to confirm the Project is set. What do you get? Post a ScreenGrab.

Q2 - Understood.

Q3 - Please use MediaInfo Utility. It will gives us far more information than VLC to assist you. Once you’ve used that Report back here.

And I used my old phone, it was just an old video I had, I think it was my Honor 8

Here is the info i got using media info:

Complete name                            : C:\Users\minec\Downloads\videoplayback.mp4
Format                                   : MPEG-4
Format profile                           : Base Media / Version 2
Codec ID                                 : mp42 (isom/mp42)
File size                                : 317 KiB
Duration                                 : 10 s 170 ms
Overall bit rate mode                    : Variable
Overall bit rate                         : 255 kb/s
Encoded date                             : UTC 2017-06-27 06:25:04
Tagged date                              : UTC 2017-06-27 06:25:04

Part 2:

ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : Baseline@L2.1
Format settings                          : 1 Ref Frames
Format settings, CABAC                   : No
Format settings, Reference frames        : 1 frame
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 9 s 910 ms
Bit rate                                 : 185 kb/s
Maximum bit rate                         : 246 kb/s
Width                                    : 360 pixels
Height                                   : 360 pixels
Display aspect ratio                     : 1.000
Frame rate mode                          : Constant
Frame rate                               : 22.000 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.065
Stream size                              : 223 KiB (70%)
Tagged date                              : UTC 2017-06-27 06:25:04
Color range                              : Limited
Color primaries                          : BT.601 PAL
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.601
Codec configuration box                  : avcC

Part 3:

ID                                       : 2
Format                                   : AAC LC
Format/Info                              : Advanced Audio Codec Low Complexity
Codec ID                                 : mp4a-40-2
Duration                                 : 10 s 170 ms
Bit rate mode                            : Variable
Bit rate                                 : 72.0 kb/s
Maximum bit rate                         : 76.5 kb/s
Channel(s)                               : 1 channel
Channel layout                           : C
Sampling rate                            : 44.1 kHz
Frame rate                               : 43.066 FPS (1024 SPF)
Compression mode                         : Lossy
Stream size                              : 89.5 KiB (28%)
Title                                    : IsoMedia File Produced by Google, 5-11-2011
Language                                 : English
Encoded date                             : UTC 2017-06-27 06:25:04
Tagged date                              : UTC 2017-06-27 06:25:04

I clicked the button once again to be sure, here are the full settings:

And I used my old phone, it was just an old video I had, I think it was my Honor 8

@JoshiStitic - Ah, we are getting somewhere. Now get us that media information from the MediaInfo Utility. It’s free and you will make use of it in the future too.

The problem here is VegasCreativeSoftware managing the expectations of its Customers. Meaning, because VP is very Media agnostic, we believe VP can ingest anything. That’s the Problem, it’s actually a Problem of Success. OK, get us that MediaInfo? Please?

We cross posted.... OK, looking at that MediaInfo information there’s not much I recognise that CP would. But I could be wrong.

I now want you to check out that the Render process “works” on a known to VP piece of media. Start a Fresh Project and save as Project2. Add some VP Generated Media, anything Text, Solid Colour, whatever and hit Render. And the result is....?

Well I don't think the media is the problem, I did a test where i just took a default gradient that was built into Vegas pro and it still didn't render, plus I used just jpg and png pictures and tried to render too, still not rendering

Well I don't think the media is the problem,

@JoshiStitic - Well, we’ve eliminated that as a potential cause then. This is good.

I did a test where i just took a default gradient that was built into Vegas pro and it still didn't render, plus I used just jpg and png pictures and tried to render too, still not rendering.

@JoshiStitic - OK, force a manual change of Settings? Yup, this is serious! If you haven’t already done so, do a clean Reinstall of VP. Presently, I’m thinking that that old MP4 started a routine that has banjaxed Vegas, and has taken up residence.