Failed to create ModelTargetObserver: DATABASE_LOAD_ERROR

[lbfff]

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Summarize the bug: Custom MTG DB cannot load on UnityEdotor(2020.3.18f1 and 2023.2.20f1c1)

Observed problem My Vuforia license is basic. I created a new Database using MTG(10.22.5) with 1 obj to test Model Target feature. I used the CoreSample project with Vuforia Engine and I applied my custom DB in the inspector window with the Sample Scene for Model Target. Once I clicked play, Console shows the load error message:Exception in callback: Failed to create ModelTargetObserver: DATABASE_LOAD_ERROR.

Expected result Creating dataset and Vuforia Started.

Other observations 1.When I saw this bug report(https://github.com/PTCInc/vuforia-engine/issues/69), I tried to change my password or even account to regenerate the DB and license, but it still didn't work. 2.I also created a new Database using MTG(10.22.5) with another fbx file to generate Database, but it still didn't work.

Reproducible steps Steps to reproduce the behavior:

1. Install MGT(10.22.5) on Windows
2. Log in with basic license account
3. Click Create button to get Custom DB using obj files.
4. Import the DB in CoreSample unity project.
5. Open ModelTargetStandrad Scene which import by Core Samples,Switch Database to my custom DB.
6. Click Play.
7. See Error.

Affected Vuforia Engine version: v10.22.5.

Affected platform:

• Workstation OS: Windows
• Platform : Unity
• Platform version :2020.3.18f1,2023.2.20f1c1

Device or platform logs Exception in callback: Failed to create ModelTargetObserver: DATABASE_LOAD_ERROR. UnityEngine.Debug:LogErrorFormat (string,object[]) Vuforia.Internal.Utility.UnityLogger:LogError (string,object[]) Vuforia.Internal.Utility.Log:Error (string,object[]) Vuforia.Utility.ExtensionMethods.DelegateHelper:InvokeDelegate (System.Delegate,object[]) Vuforia.Utility.ExtensionMethods.DelegateHelper:InvokeWithExceptionHandling (System.Action) Vuforia.Internal.Core.Engine:OnStart () Vuforia.Internal.Core.Engine:Start (System.Action) Vuforia.Internal.Core.Engine:Start () Vuforia.VuforiaBehaviour:AfterVuforiaInitialized (Vuforia.VuforiaInitError) System.Delegate:DynamicInvoke (object[]) Vuforia.Utility.ExtensionMethods.DelegateHelper:InvokeDelegate (System.Delegate,object[]) Vuforia.Utility.ExtensionMethods.DelegateHelper:InvokeWithExceptionHandling<Vuforia.VuforiaInitError> (System.Action`1<Vuforia.VuforiaInitError>,Vuforia.VuforiaInitError) Vuforia.Internal.Core.Engine:InitOnCameraReady () Vuforia.WebCam:HandleFirstWebCamFrame () Vuforia.WebCam:<Init>b__34_0 (bool) Vuforia.Internal.Utility.VuforiaCoroutineUtility/<RunCoroutineWithTimeout>d__1:MoveNext () UnityEngine.SetupCoroutine:InvokeMoveNext (System.Collections.IEnumerator,intptr)

[ptc-epassaro]

Hi @lbfff, did you add your license key to the VuforiaConfiguration? Here you can find the steps on how to configure a Unity project with Vuforia: https://developer.vuforia.com/library/getting-started/getting-started-vuforia-engine-unity#vuforia-engine-setup

[lbfff]

Hi @lbfff, did you add your license key to the VuforiaConfiguration? Here you can find the steps on how to configure a Unity project with Vuforia: https://developer.vuforia.com/library/getting-started/getting-started-vuforia-engine-unity#vuforia-engine-setup

Yes, I added my license key to the VuforiaConfiguration but it still didn't work.

[ptc-epassaro]

@lbfff Does the VuforiaMars_ModelTarget work or does it give you the same error?

[ptc-epassaro]

@lbfff if possible, it would be great if you could share your ModelTarget databases with us so we can try to reproduce the issue. You can share it with us via [email protected]

[lbfff]

@lbfff if possible, it would be great if you could share your ModelTarget databases with us so we can try to reproduce the issue. You can share it with us via [email protected]

I just replied to you in the email and uploaded my DB in the attachment. Did you not receive it？

[ptc-epassaro]

Hi @lbfff, unfortunately we still haven't received your email with the dataset. Could you please retry?

[lbfff]

@lbfff if possible, it would be great if you could share your ModelTarget databases with us so we can try to reproduce the issue. You can share it with us via [email protected]

I have sent a new email with attachments to this email. Have you received it？

[ptc-epassaro]

@lbfff yes, thank you! I was able to reproduce the issue with your database. We will investigate the issue and keep you posted on the progress.

[lbfff]

@lbfff yes, thank you! I was able to reproduce the issue with your database. We will investigate the issue and keep you posted on the progress.

May I ask when this issue can be fixed? I really hope to use Vuforia to provide our team with a verifiable model tracking solution as soon as possible.

[ptc-epassaro]

Hi @lbfff, a fix that could potentially be related to this issue has been released with Vuforia 10.24, sorry for not getting back to you right away. Could you please try the new version of the Model Target Generator and let us know if things improve?

[lbfff]

Hi @lbfff, a fix that could potentially be related to this issue has been released with Vuforia 10.24, sorry for not getting back to you right away. Could you please try the new version of the Model Target Generator and let us know if things improve?

I downloaded the latest MTG(10.24.4), but in the last step, clicking on Generate Standard ModelTarget failed to generate an error message in the pop-up window. The reason for the error is Invalid signature received.

[ptc-epassaro]

Thank you for trying the new version. I will talk to the team and let you know as soon as I have more information.

[ptc-epassaro]

@lbfff could you please send us the log file from the Model Target Generator that is produced when this error happens? You can follow these steps to reach the file:

• Try to create a ModelTarget to get the error in the app
• Go back to the Home screen of the Model Target Generator
• Click on your initials in the upper-right corner
• Click the Open Log option
• You should see the log file in an Explorer window

If you prefer, you can also share the file with us by sending it via email to [email protected].

[ptc-epassaro]

Closing this issue due to inactivity. Feel free to reopen it if the problem persists.