Safe Exam Browser (SEB) Not Starting

[QuantumTechSolution]

Hello Team,

I am encountering an issue with Safe Exam Browser (SEB) and would like to request assistance. Below are the errors I am receiving:

2025-01-14 15:38:55.777 [07] - DEBUG: [Process 'SafeExamBrowser.Client.exe' (11692)] Initialized termination event.
2025-01-14 15:38:55.777 [07] - INFO: Waiting for client to complete initialization...
2025-01-14 15:38:56.565 [18] - DEBUG: [RuntimeHost] Received connection request with authentication token '2b56dc78-9298-435f-bb57-4e15d9465b56'.
2025-01-14 15:38:56.565 [18] - DEBUG: [RuntimeHost] Accepted connection request.
2025-01-14 15:38:56.581 [14] - DEBUG: [RuntimeHost] Received message 'SimpleMessage -> ConfigurationNeeded', sending response 'ConfigurationResponse'.
2025-01-14 15:38:58.005 [18] - DEBUG: [RuntimeHost] Received disconnection request with message 'DisconnectionMessage'.
2025-01-14 15:38:58.085 [18] - DEBUG: [Process 'SafeExamBrowser.Client.exe' (11692)] Process has terminated.
2025-01-14 15:38:58.086 [07] - ERROR: Client instance terminated unexpectedly during initialization!
2025-01-14 15:38:58.086 [07] - ERROR: Failed to start new client instance! Aborting procedure...

2025-01-14 15:38:57.472 [01] - ERROR: Caught unexpected exception while performing operation 'LazyInitializationOperation'!

2025-01-14 15:36:06.041 [07] - WARNING: [Registry] Failed to get sub keys for 'HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\TaskFlow\DeviceCache'.

I have collected additional information regarding these errors, but I still need assistance with finding a solution. The issue arises when attempting to start the SEB client, which terminates unexpectedly during initialization. Additionally, I encounter an unexpected exception during the 'LazyInitializationOperation' and am unable to retrieve certain registry keys.

Could you please guide me on the steps I should take to resolve these issues?

Thank you!

[QuantumTechSolution]

Hi @dbuechel

We are using this version.

[dbuechel]

Thanks for the information. We should have fixed this issue with #747 resp. #777. Could you please post a screen shot of the following registry path resp. its existing parent?

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\TaskFlow\DeviceCache

[QuantumTechSolution]

I will share it tomorrow as I don’t have my computer with me right now, but thank you for the information.

[QuantumTechSolution]

@dbuechel Hi,

For example, I quickly checked a sample computer and saw that it is empty. What do we need in this case?

[dbuechel]

Thanks for the update. Could you please provide the complete log files of the affected session? There might be an issue to be fixed, but I'd need to verify this in context of the entire log file.

[QuantumTechSolution]

@dbuechel Hi,

I have attached the logs.
2025-01-14_15h38m54s_Runtime.log

2025-01-14_15h38m54s_Client.log

[JStromGY]

v8_context_snapshot.bin is missing. It's not the best solution but if you replace it with the file from a working SEB install it will run.

I've seen this happen many times(in 3.6, 3.7. 3.8), starting roughly in October, and I'm not entirely sure WHY but v8_context_snapshot.bin(or icudtl.dat) gets temporarily moved/renamed and not restored. If you check the registry you might find a "PendingFileRenameOperations" related to this.