What's "Curl error 56"?

Sometimes, when I wake up my PC from sleep mode and focus Unity, the editor outputs the following error:

Code (CSharp):

1. [collab-accelerator] discovery started due to a new cloud project binding
2. Curl error 56: Receiving data failed with unitytls error code 1048578
3. (Filename: C:\buildslave\unity\build\Modules/UnityWebRequest/Implementations/TransportCurl.cpp Line: 805)

What is this telling me? I'm not using any Unity services and I don't use Collaborate/Accelerator, these packages aren't installed.

I haven't seen this error in earlier Unity versions. I guess it's new to 2019.3?

 

i'm using 2019.2.16 and just got this error too.

 

Unity 2019.3.0f1, got this error.

 

2019.3.0f1, same error

 

Please provide steps to reproduce on a new/empty project. I'm running 2019.3.0f1 and don't see the error.

 

I got the same error. And I found that Package Manger can't load package list. It seems that a network issue with Package list server happened. I am in China, you guy got same problem may show your location.

 

Same error from Germany, mostly happens after I put my computer to hibernate. Error only triggered once per wakeup.

Specs:
Windows 10 Pro 1903
Unity 2019.3.0f3
UnityHub 2.2.1
Using UPM with custom Git Packages, but not started with hub (since then my git environment path is somehow overwritten - see https://forum.unity.com/threads/unityhub-breaks-git-path-for-package-manager.788096/)
Error Message:

Code (csharp):

1. Curl error 56: Receiving data failed with unitytls error code 1048578

Hope that helps

 

If anyone is receiving this error, could you capture a Charles Proxy session? We could see which endpoint it is trying to hit. Once you install Charles, from the Help menu choose SSL Proxying/Install Charles root certificate and REBOOT. Start Charles, then start the Unity Editor until you see the error, then stop the Charles capture and save the session and attach here or in a private message.

 

Hi Jeff,

I tried it a few times and actually managed to record the error for you \o/


The report is attached to this post. I hope that helps you track down the source.

Cheers
Johannes

 

Ah, sorry, I left out a critical step. As you can see, the information is still encrypted so we can't read it. I trust that you added the Charles root certificate and rebooted, but you also need to add the following in Charles. Go to menu Proxy/SSL Proxying Settings... and add

*.unity3d.com:*

Also, I might suggest that you delete your previous attachment as it might expose your IP address, etc. Probably best to send it to me next time in a private conversation, then I'll review and follow up here. And make sure those red X's are gone (unencrypted)

 

Hi Jeff,

dang, okay I will try to catch one of those errors again.

I added your include (*.unity3d.com:* had an invalid character error, so I added *.unity.com*).


I think the sertup is not finished that way, now I'm getting Curl error 51 in the editor.

Code (csharp):

1. Curl error 51: Cert verify failed: UNITYTLS_X509VERIFY_FLAG_UNKNOWN_ERROR

Do I need to change anything else in Charles? Never used the program before, so there might be settings I'm still missing in order to run the program properly.

 

The last asterisk is the wild card for the port number. You don't actually type in the :'s Also can you confirm that you installed the Charles root certificate and rebooted? This may help, note the section on Windows 10 to ensure you place the certificate correctly https://support.unity3d.com/hc/en-us/articles/115002917683-Using-Charles-Proxy-with-Unity

 

This problem is annoying.

 

HI Jeff,

sadly I can't get it working, did a few restarts and tried some different settings, but I get errors all over the place. Hope somebody else finds the time to do a repro.

 

I also got that message in 2019.2, 2019.3 and 2020.1. I saw the error messages in the console but I'm unable to tell when exactly and after doing what they appeared.

It never popped up in blank new projects.

I'm not using any proxy and my PC is under Windows 7 SP1.

 

Got same error for two days now in 2019.2.17f1.
It happens in the editor every 5 minutes or so when game is not played, and if game is played it just crashes unity without any warning.
It pops up even on new empty project.

Curl error 56: Receiving data failed with unitytls error code 1048578
in EditorLog i've got:
(Filename: C:\buildslave\unity\build\Modules/UnityWebRequest/Implementations/TransportCurl.cpp Line: 796)

 

We need a Charles capture to see what is happening here. We are not able to reproduce.

 

I've got the same error causing unity 2019.2.17f1 to crash in play mode.
Maybe my log would help you find a way to solve it.

Curl error 56: Receiving data failed with unitytls error code 1048578



(Filename: C:\buildslave\unity\build\Modules/UnityWebRequest/Implementations/TransportCurl.cpp Line: 796)



Function class SoundChannelInstance *__cdecl SoundChannel::eek:perator ->(void) const may only be called from main thread!

(Filename: C:\buildslave\unity\build\Modules/Audio/Public/sound/SoundManager.cpp Line: 35)



* Assertion at ..\mono\metadata\threads.c:1788, condition `internal' not met

 

I cannot provide a "Charles" capture but I just got this curl error message. This time, circumstances are very clear: my internet connection was cut for a few minutes and the message appeared just at that time.

The connection was cut at the origin; I didn't unplug my computer from the internet.

Message:

Code (CSharp):

1. Curl error 56: Receiving data failed with unitytls error code 1048578
2. 0x000000014253496C (Unity) StackWalker::GetCurrentCallstack
3. 0x0000000142537E41 (Unity) StackWalker::ShowCallstack
4. 0x0000000140DC5E55 (Unity) GetStacktrace
5. 0x00000001430EDCCB (Unity) DebugStringToFile
6. 0x0000000142C58F91 (Unity) TransportCurl::TransformCurlErrorToWebError
7. 0x0000000142C56243 (Unity) CurlExecutor::CurlExecute
8. 0x0000000141E4F59E (Unity) JobQueue::Exec
9. 0x0000000141E55E9B (Unity) JobQueue::Steal
10. 0x0000000141E4FD73 (Unity) JobQueue::ExecuteJobFromQueue
11. 0x0000000141E518FD (Unity) JobQueue::ProcessJobs
12. 0x0000000141E56E96 (Unity) JobQueue::WorkLoop
13. 0x000000014237D4A7 (Unity) Thread::RunThreadWrapper
14. 0x0000000076F1556D (kernel32) BaseThreadInitThunk
15. 0x000000007717372D (ntdll) RtlUserThreadStart

 

Hi, Jeff. This is my result after using Charles. Is this help? I can't upload the session file. You can leave a email for me to send it to you.

 

I keep getting these errors for a week(maybe 2 weeks, i did not give attention to this error);
Curl error 51: Cert verify failed: UNITYTLS_X509VERIFY_FLAG_NOT_TRUSTED ,
Curl error 56: Receiving data failed with unitytls error code 1048578,
Curl error 6: Could not resolve host: config.uca.cloud.unity3d.com
after latest unity hub patches (last 1 or 2 patches i am not sure which one causing it).

Error even occurs in built projects. I saw curl error : 51 in deployed project then started my research about this.

Used assets;
SteamVR v2.5.0
Odin inspector 2.1.5,
Dotween v1.2.235, DotweenPro v1.0.145
and my own offline packages with no connection other than my local git repo.

Test cases
Connection types: Offline, Company wifi, public wifi. (shortcuts: off, cwifi, pwifi)
Connected devices: PC and Company computer with admin rights. (shortcuts: pc, cc)
Tested environments: Unity Editor 2019.2.16f1, Built project with 2019.2.16f1 (shortcuts: editor, built)
Error shortcuts: err51, err56, err6, none


You may import following code to CSV editors for better result. I'll write in CSV format (seperator: comma, ending: newline op)

#,connectionType,connectedDevice,testEnv,err,note

0,off,cc,built,err51,"customer encountered with unity.exe stops during play."

1,off,cc,built,none,"on customer computer, tested for 8 hours in following day. No errors encountered."

2,cwifi,cc,built,err6,"encountered this error several times but did not cause any kind of crash."

3,off,cc,built,err6,"encountered this error several times but did not cause any kind of crash."

4,off,pc,built,none,"nothing hapened when i try in my computer."

5,pwifi,pc,built,err6,"stated giving annying error."

6,off,pc,built,none,"kept giving this error."

7,off,pc,editor,none,"editor seems clear."

8,cwifi,pc,editor,none,"seems clear again. I has been 4 hours since i connect via my pc."

9,cwifi,pc,editor,err56,"console goes rage mode and gives this error in every 10 seconds."

10,cwifi,pc,editor,err51,"after installing charles according to this topic, suddenly 10 duplicate of this error appeared. Only after 2 seconds of charles installation and rebooting."

@JeffDUnity3D, i'll send you my charles reports in PM in following minute. But i could not "get rid of red cross" even i correctly installed via guide that you sent. (Trying to test in company connection. Maybe our IT blocks something here)

 

@JeffDUnity3D I didn't get a crash, but I did get the Curl error when I added this to my frag shader:

return saturate(color);

Curl error 56: Receiving data failed with unitytls error code 1048578

 

Sorry no, the red x's means it's still encrypted. Please follow the previous instructions for installing the Charles root certificate and setting the proper SSL endpoint configuration in Charles.

 

Sorry, I follow the instruction and still get the red x.

 

Then you missed a step most likely.

* Turn off Windows Firewall
* Install the Charles root certificate and move it to the correct location in cert manager and reboot.
* Set the proper settings under SSL Proxying in Charles.

If you still see the red x's, there is no need to provide the file or screenshots.

 

Well, The problem may be solved.

I get it wrong. When I close Charles it immediately shows a "curl error 56".

 

저도 같은 에러가 뜹니다.. 해결책좀 알려주세요 T_T

 

Not sure what you mean by get it wrong, can you confirm you followed all the steps? We would need to see the contents under v1/events

 

I upload the session file and change its extension to 'txt'. You can change it back to '.chls' and see the contents.

 

Finally! So the events are Editor events, and would not be expected to show in your game on a device. You can disable the events https://docs.unity3d.com/Manual/EditorAnalytics.html but it does look like it currently requires the Pro version. I checked with engineering and we should be opening up this setting to everyone early January.

 

Yes but it happened suddenly. It's my problem too. i don't know why. This is the screenshot.

 

Same here and its a new project. But when I play the game, run everything fine.

 

Please see my previous post

 

If someone could submit a bug report and attach a minimal project and provide the issue ID here, it would be helpful. Ideally start with a new/empty project and see if it reproduces.

 

Hello,

I just modified the setting to disable editor analytics and hopefully the error will be gone.
@JeffDUnity3D I doubt it has anything to do with a project. Been toying with multiple new projects in December and I've seen this error on all of them. I did install Odin on all of them but other than that I mostly write a few scripts to test out stuff without modifying any project settings or importing other things.

Update:
Unity no longer shows that error but does sometimes crash when pressing play and if I look into the logs I see this at the end:

Code (CSharp):

1. Curl error 56: Receiving data failed with unitytls error code 1048578
2.  
3. (Filename: C:\buildslave\unity\build\Modules/UnityWebRequest/Implementations/TransportCurl.cpp Line: 796)
4.  
5. * Assertion at ..\mono\metadata\threads.c:1788, condition `internal' not met

Update 2: Got the same crash while the editor was idle for a few minutes (I was afk). Same entry in the log. Number of crashes seems to have increased since changing the editor analytics preferences.

 

Hi, just to log I am getting the same issue with Unity crashing in both new and loading old projects. Normally about 10-15 minutes after restarting after the previous crash. Same error message.. Curl error 56: Receiving data failed with unitytls error code 1048578. After this shows up the crash will occur within a few minutes, normally the next time I press play.

 

We've been able to reproduce here, and hopefully it will be addressed in a future release.

 

I have the same issue. My editor crashes oftenly with this error in the log.

 

I got the same error. Everything was fine until I upgraded to the latest version, now when I press play in my game, it pops up.

 

Is there a temporary manually solution for this problem while we are waiting for release with fix? It's impossible to work now, crashes happens oftenly. It reproduces in both version which I use: 2019.3.0f3 and 2019.2.17.f1

 

If you can, roll back to 2019.1.14. My team has stayed on that version for a while because upgrading breaks our project.

 

At least for me, openening the console and disabling "Error on Play" as mentioned, stopped the crashes.

 

So, Unity is using our bandwith to send itself data and you can't even turn it off, and worst... it's even bugged!?
Unity is becoming more and more a very shi*ty company.

 

Yes, it's ridiculous. And there isn't even a temporary solution since the problem is found out.

 

@ProtoTerminator Thanks for that. After downgrading to 2019.1.14 everything is working very well.

 

Is there a bug report we can follow to know when this will be fixed?

 

Sorry I don't follow. Typically a bug report is created first, then the fix is rolled out once the necessary code change is identified, fixed and tested. This is a fairly typical process.

 

So, can anyone confirm that disabling editor analytics resolves this issue please? E.g. as described here:

https://docs.unity3d.com/Manual/EditorAnalytics.html

 

It may help, I've heard from one user that it does indeed help. You can also disable Editor Analytics by opting out at id.unity.com