Can not get mantaflow fluid simulations to work no matter what i do #94339

New Issue

Nathan · 2021-12-23T05:38:38+01:00

Nathan commented

2021-12-23 05:38:38 +01:00

System Information
Operating system: Windows 10 x64
Graphics card: rtx 3070ti

Blender Version
Broken: 2.93/3.0 and probably more versions that i havent been able to test
Worked: It used to work and I dont know what changed

My fluid simulations stopped working. I have deleted blender and reinstalled and i have tried other versions and i have tried deleting all files associated with blender then redownloading, also updated graphics drivers and nothing is working.

I cant even create basic fluid sims even if i click on the default cube and go to object and quick fluid simulation

It also happens with every single file so attaching a file is i believe attaching a file is useless

**System Information** Operating system: Windows 10 x64 Graphics card: rtx 3070ti **Blender Version** Broken: 2.93/3.0 and probably more versions that i havent been able to test Worked: It used to work and I dont know what changed My fluid simulations stopped working. I have deleted blender and reinstalled and i have tried other versions and i have tried deleting all files associated with blender then redownloading, also updated graphics drivers and nothing is working. I cant even create basic fluid sims even if i click on the default cube and go to object and quick fluid simulation It also happens with every single file so attaching a file is i believe attaching a file is useless

Nathan commented

2021-12-23 05:38:38 +01:00

Added subscriber: @Lousybird

Richard Antalik commented

2021-12-23 06:15:37 +01:00

Added subscriber: @iss

Richard Antalik commented

2021-12-23 06:15:37 +01:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Richard Antalik commented

2021-12-23 06:15:37 +01:00

Please provide .blend file where simulation doesn't work.

Garek commented

2021-12-23 06:42:08 +01:00

Added subscriber: @Garek

Garek commented

2021-12-23 06:42:08 +01:00

Cannot reproduce here, working fine.

Can you try with factory settings? File -> Defaults -> Load Factory Settings

Cannot reproduce here, working fine. Can you try with factory settings? `File` -> `Defaults` -> `Load Factory Settings`

Nathan commented

2021-12-23 09:48:32 +01:00

In #94339#1277411, @Garek wrote:
Cannot reproduce here, working fine.

Can you try with factory settings? File -> Defaults -> Load Factory Settings

Just tried that and it still did not work

> In #94339#1277411, @Garek wrote: > Cannot reproduce here, working fine. > > Can you try with factory settings? `File` -> `Defaults` -> `Load Factory Settings` Just tried that and it still did not work

Thomas Dinges commented

2021-12-23 10:37:05 +01:00

Added subscriber: @ThomasDinges

Thomas Dinges commented

2021-12-23 10:37:05 +01:00

Have you tried the Quick Liquid operator? https://docs.blender.org/manual/en/latest/physics/introduction.html#bpy-ops-object-quick
Works fine for me.

Have you tried the Quick Liquid operator? https://docs.blender.org/manual/en/latest/physics/introduction.html#bpy-ops-object-quick Works fine for me.

Nathan commented

2021-12-23 11:12:08 +01:00

In #94339#1277518, @ThomasDinges wrote:
Have you tried the Quick Liquid operator? https://docs.blender.org/manual/en/latest/physics/introduction.html#bpy-ops-object-quick
Works fine for me.

I have also tested with this many times and it doesnt work either

> In #94339#1277518, @ThomasDinges wrote: > Have you tried the Quick Liquid operator? https://docs.blender.org/manual/en/latest/physics/introduction.html#bpy-ops-object-quick > Works fine for me. I have also tested with this many times and it doesnt work either

Garek commented

2021-12-23 11:54:41 +01:00

Can you use screen video recording tool of your choice to upload video of what's happening? Preferably that will show how you load factory settings and then use Quick Liquid or other simulation tool to show your problem.

Also did you downloaded Blender from this link?
https://www.blender.org/download/

Can you use screen video recording tool of your choice to upload video of what's happening? Preferably that will show how you load factory settings and then use `Quick Liquid` or other simulation tool to show your problem. Also did you downloaded Blender from this link? https://www.blender.org/download/

Nathan commented

2021-12-24 06:33:14 +01:00

2021-12-23 21-28-44.mp4

[2021-12-23 21-28-44.mp4](https://archive.blender.org/developer/F12773960/2021-12-23_21-28-44.mp4)

Nathan commented

2021-12-24 06:33:41 +01:00

I know its on my end but i have no idea why or how and yes i downloaded it from the official blender website

Garek commented

2021-12-24 10:47:45 +01:00

Thanks. That is really strange.

I see two ways to move forward:

Perhaps new driver is at fault (we have that problem from time to time). You can try to downgrade it and see if that helps.
Let's try to create some evidence. Please open Blender's installation directory and double click on the blender_debug_gpu_glitchworkaround.cmd. This will start Blender in debug mode and create log files. Additionaly it'll enable workarounds for typical GPU issues and disable all GPU extensions. Try to reproduce the issue again. Once you close Blender manually the Windows Explorer should open and show you up to two files, a debug log and the system information. Add them to your bug report so we could try to figure it out.

Thanks. That is really strange. I see two ways to move forward: 1) Perhaps new driver is at fault (we have that problem from time to time). You can try to downgrade it and see if that helps. 2) Let's try to create some evidence. Please open Blender's installation directory and double click on the `blender_debug_gpu_glitchworkaround.cmd`. This will start Blender in debug mode and create log files. Additionaly it'll enable workarounds for typical GPU issues and disable all GPU extensions. Try to reproduce the issue again. Once you close Blender manually the Windows Explorer should open and show you up to two files, a debug log and the system information. Add them to your bug report so we could try to figure it out.

Nathan commented

2021-12-24 11:00:45 +01:00

blender_debug_output.txt

blender_system_info.txt

[blender_debug_output.txt](https://archive.blender.org/developer/F12774128/blender_debug_output.txt) [blender_system_info.txt](https://archive.blender.org/developer/F12774129/blender_system_info.txt)

Nathan commented

2021-12-24 11:01:40 +01:00

After opening it with the gpu workaround the fluid sim was working again so i might try switching to the nvidia studio drivers to see if that might help the problem

Garek commented

2021-12-24 11:07:52 +01:00

That's good to hear. You might use it for your work but AFAIK it'll make overall performance worse. There is also blender_debug_gpu_.cmd that doesn't do any workarounds, just debug log, it'll be good to see that one too.

That's good to hear. You might use it for your work but AFAIK it'll make overall performance worse. There is also `blender_debug_gpu_.cmd` that doesn't do any workarounds, just debug log, it'll be good to see that one too.

Nathan commented

2021-12-24 11:33:15 +01:00

So i just tried the other cmd of blender debug gpu and what is weird is that you are saying that it doesnt do any workaround yet somehow the fluid sims will work in that but not if i only run it the main way. I have also just reinstalled drivers completely again and nothing changed in that way and i have also gone back to downloading 3.0 from steam

Garek commented

2021-12-24 11:46:00 +01:00

It shouldn't. What about blender_debug_log.cmd (not gpu-specific debug) and blender_factory_startup.cmd (start with factory settings with even less debug logs)?

It shouldn't. What about `blender_debug_log.cmd` (not gpu-specific debug) and `blender_factory_startup.cmd` (start with factory settings with even less debug logs)?

Nathan commented

2021-12-26 05:19:45 +01:00

Just tried both of them and both of them work just fine. Ill send a video showing how it works with those but doesnt work with opening it through steam and through the windows search.

Garek commented

2021-12-26 05:29:17 +01:00

In a folder with Blender there is two files:
blender-launcher.exe - launching Blender bypassing command line
blender.exe - with command line (was the only way up to 2.93 I think)
Is using either one of them helps with issue?

In a folder with Blender there is two files: `blender-launcher.exe` - launching Blender bypassing command line `blender.exe` - with command line (was the only way up to 2.93 I think) Is using either one of them helps with issue?

Nathan commented

2021-12-26 05:56:20 +01:00

I went to upload the video but forgot to send it so let me send that really quick. And the answer is no

Nathan commented

2021-12-26 06:01:27 +01:00

2021-12-25 20-20-17.mp4

[2021-12-25 20-20-17.mp4](https://archive.blender.org/developer/F12776143/2021-12-25_20-20-17.mp4)

Garek commented

2021-12-26 06:21:27 +01:00

Changed status from 'Needs User Info' to: 'Needs Triage'

Garek commented

2021-12-26 06:21:27 +01:00

Thanks for all the help trying to understand the issue.

Unfortunately I'm out of ideas how to help further. You can make shortcut of blender_debug_log.cmd to use it instead of your usual shortcut. Not ideal but at least it does the work.

Meanwhile I'll tag it as Unconfirmed since we can't figure out reproduce steps, fixing something that only user can reproduce is hard for developers. And also since we can't really make sure it's problem with Blender itself and not with OS/driver/etc.
I'll additionally change status to Need Triage so that others can look at it too.

Thanks for all the help trying to understand the issue. Unfortunately I'm out of ideas how to help further. You can make shortcut of `blender_debug_log.cmd` to use it instead of your usual shortcut. Not ideal but at least it does the work. Meanwhile I'll tag it as `Unconfirmed` since we can't figure out reproduce steps, fixing something that only user can reproduce is hard for developers. And also since we can't really make sure it's problem with Blender itself and not with OS/driver/etc. I'll additionally change status to `Need Triage` so that others can look at it too.

Garek commented

2021-12-26 07:12:18 +01:00

Actually I think I can help you a little more.

You see, you can edit your Blender shortcut to make it run with similar conditions as with .cmd files. Right click on shortcut -> Properties -> Target box. You can see that it contains full path to original Blender execution file. Click on that box and go all the way to the end outside of quotes either manually or pressing {key End}. Next you can add command line arguments (separating them with {key Space}) so that Blender will run them as he launches.

You can try to add -d that will launch it with debug mode and see if that helps so that you can keep using Blender shortcut, not .cmd one. You can also experiment with other arguments, see:
https://docs.blender.org/manual/en/latest/advanced/command_line/arguments.html

Actually I think I can help you a little more. You see, you can edit your Blender shortcut to make it run with similar conditions as with `.cmd` files. Right click on shortcut -> `Properties` -> `Target` box. You can see that it contains full path to original Blender execution file. Click on that box and go all the way to the end outside of quotes either manually or pressing {key End}. Next you can add command line arguments (separating them with {key Space}) so that Blender will run them as he launches. You can try to add `-d` that will launch it with debug mode and see if that helps so that you can keep using Blender shortcut, not `.cmd` one. You can also experiment with other arguments, see: https://docs.blender.org/manual/en/latest/advanced/command_line/arguments.html

Nathan commented

2021-12-27 09:25:17 +01:00

Yeah I tried adding the -d and it still wasnt working right for some reason so i just gave up and moved everything that was important on my c drive to my other drives and restarted my pc. It is now working again but i will keep testing it as i download things back so i can try and test to see if there was a specific thing that caused it.

Garek commented

2021-12-27 09:39:04 +01:00

So it was not working on your C drive and on the others it's fine?
Perhaps your drive is damaged or already close to it's life span? There should be software/utilities that can check it.

So it was not working on your C drive and on the others it's fine? Perhaps your drive is damaged or already close to it's life span? There should be software/utilities that can check it.

Garek commented

2022-01-22 08:04:42 +01:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Garek commented

2022-01-22 08:04:42 +01:00

Hi, can you tell how it's going? Was it problem with C drive? Do you still encounter this issue?

Richard Antalik commented

2022-04-12 20:38:27 +02:00

Changed status from 'Needs User Info' to: 'Archived'

Richard Antalik closed this issue

2022-04-12 20:38:27 +02:00

Richard Antalik commented

2022-04-12 20:38:27 +02:00

No activity for more than a week. As per the tracker policy we assume the issue is gone and can be closed.

Thanks again for the report. If the problem persists please open a new report with the required information.

No activity for more than a week. As per the tracker policy we assume the issue is gone and can be closed. Thanks again for the report. If the problem persists please open a new report with the required information.

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Can not get mantaflow fluid simulations to work no matter what i do #94339