Errors on Launch

[x3VILBaconx]

Having an issue when launching tests using SEB. We use linkit as a method for creating assignments/tests so that students are in lockdown when doing these assignments. Program is deployed via intune, all devices are windows 11, all firewall/antivirus/filtering is disabled while troubleshooting these issues.

For some reason, when launching a test (on version 2.4.1) , there is just a blank white screen. no log files are generated.

On the latest release (3.10), there is a session start error, just says that it failed to start a session.

attached are log files for the 3.10 issue. program works on personal laptop, just not sure what to look for in these files to determine what is preventing us from launching the program.

seblog.txt
2025-10-17_11h36m52s_Client.log
2025-10-17_11h36m52s_Runtime.log

[dbuechel]

When attempting to start a new instance of the client application component, SEB encounters the following error:

2025-10-17 11:36:55.609 [12] - INFO: Starting new client process...
2025-10-17 11:36:55.612 [12] - INFO: [ProcessFactory] Attempting to start process 'C:\Program Files\SafeExamBrowser\Application\SafeExamBrowser.Client.exe'...
2025-10-17 11:36:55.756 [12] - ERROR: [ProcessFactory] Failed to load process names for EpmClientStub!

   Exception Message: Sequence contains no elements
   Exception Type: System.InvalidOperationException

   at System.Linq.Enumerable.First[TSource](IEnumerable`1 source)
   at SafeExamBrowser.WindowsApi.Processes.ProcessFactory.LoadProcessNamesFor(Process process) in .\SafeExamBrowser.WindowsApi\Processes\ProcessFactory.cs:line 149

2025-10-17 11:36:55.758 [12] - INFO: [ProcessFactory] Successfully started process 'C:\Program Files\SafeExamBrowser\Application\SafeExamBrowser.Client.exe' with ID = 22896.
2025-10-17 11:36:55.766 [12] - ERROR: Caught unexpected exception while performing operation 'ClientOperation'!

   Exception Message: Cannot process request because the process (22896) has exited.
   Exception Type: System.InvalidOperationException

   at System.Diagnostics.Process.GetProcessHandle(Int32 access, Boolean throwIfExited)
   at System.Diagnostics.Process.OpenProcessHandle(Int32 access)
   at System.Diagnostics.Process.set_EnableRaisingEvents(Boolean value)
   at SafeExamBrowser.WindowsApi.Processes.Process.InitializeEvent() in .\SafeExamBrowser.WindowsApi\Processes\Process.cs:line 145
   at SafeExamBrowser.Runtime.Operations.Session.ClientOperation.TryStartClient() in .\SafeExamBrowser.Runtime\Operations\Session\ClientOperation.cs:line 115
   at SafeExamBrowser.Runtime.Operations.Session.ClientOperation.Perform() in .\SafeExamBrowser.Runtime\Operations\Session\ClientOperation.cs:line 62
   at SafeExamBrowser.Core.OperationModel.OperationSequence`1.Perform() in .\SafeExamBrowser.Core\OperationModel\OperationSequence.cs:line 102

2025-10-17 11:36:55.768 [12] - ERROR: [Process 'EpmClientStub' (22896)] Failed to check whether process is terminated!

   Exception Message: Process was not started by this object, so requested information cannot be determined.
   Exception Type: System.InvalidOperationException

   at System.Diagnostics.Process.EnsureState(State state)
   at System.Diagnostics.Process.get_ExitCode()
   at SafeExamBrowser.WindowsApi.Processes.Process.Process_Exited(Object sender, EventArgs e) in .\SafeExamBrowser.WindowsApi\Processes\Process.cs:line 167
   at System.Diagnostics.Process.OnExited()
   at System.Diagnostics.Process.RaiseOnExited()
   at System.Diagnostics.Process.get_HasExited()
   at SafeExamBrowser.WindowsApi.Processes.Process.IsTerminated() in .\SafeExamBrowser.WindowsApi\Processes\Process.cs:line 126

2025-10-17 11:36:55.768 [12] - WARNING: Attempting to kill client process since graceful termination failed!
2025-10-17 11:36:55.768 [12] - INFO: Attempt 1/5 to kill client process with ID = 22896.
2025-10-17 11:36:55.768 [12] - DEBUG: [Process 'EpmClientStub' (22896)] Attempting to kill process...
2025-10-17 11:36:55.768 [12] - ERROR: [Process 'EpmClientStub' (22896)] Failed to kill process!

   Exception Message: Access is denied
   Exception Type: System.ComponentModel.Win32Exception

   at System.Diagnostics.Process.Kill()
   at SafeExamBrowser.WindowsApi.Processes.Process.TryKill(Int32 timeout_ms) in .\SafeExamBrowser.WindowsApi\Processes\Process.cs:line 103

2025-10-17 11:36:55.775 [12] - INFO: Attempt 2/5 to kill client process with ID = 22896.
2025-10-17 11:36:55.775 [12] - DEBUG: [Process 'EpmClientStub' (22896)] Attempting to kill process...
2025-10-17 11:36:55.775 [12] - ERROR: [Process 'EpmClientStub' (22896)] Failed to kill process!

   Exception Message: Access is denied
   Exception Type: System.ComponentModel.Win32Exception

   at System.Diagnostics.Process.Kill()
   at SafeExamBrowser.WindowsApi.Processes.Process.TryKill(Int32 timeout_ms) in .\SafeExamBrowser.WindowsApi\Processes\Process.cs:line 103

2025-10-17 11:36:55.775 [12] - INFO: Attempt 3/5 to kill client process with ID = 22896.
2025-10-17 11:36:55.775 [12] - DEBUG: [Process 'EpmClientStub' (22896)] Attempting to kill process...
2025-10-17 11:36:55.775 [12] - ERROR: [Process 'EpmClientStub' (22896)] Failed to kill process!

   Exception Message: Access is denied
   Exception Type: System.ComponentModel.Win32Exception

   at System.Diagnostics.Process.Kill()
   at SafeExamBrowser.WindowsApi.Processes.Process.TryKill(Int32 timeout_ms) in .\SafeExamBrowser.WindowsApi\Processes\Process.cs:line 103

2025-10-17 11:36:55.775 [12] - INFO: Attempt 4/5 to kill client process with ID = 22896.
2025-10-17 11:36:55.775 [12] - DEBUG: [Process 'EpmClientStub' (22896)] Attempting to kill process...
2025-10-17 11:36:55.775 [12] - ERROR: [Process 'EpmClientStub' (22896)] Failed to kill process!

   Exception Message: Access is denied
   Exception Type: System.ComponentModel.Win32Exception

   at System.Diagnostics.Process.Kill()
   at SafeExamBrowser.WindowsApi.Processes.Process.TryKill(Int32 timeout_ms) in .\SafeExamBrowser.WindowsApi\Processes\Process.cs:line 103

2025-10-17 11:36:55.775 [12] - INFO: Attempt 5/5 to kill client process with ID = 22896.
2025-10-17 11:36:55.775 [12] - DEBUG: [Process 'EpmClientStub' (22896)] Attempting to kill process...
2025-10-17 11:36:55.775 [12] - ERROR: [Process 'EpmClientStub' (22896)] Failed to kill process!

   Exception Message: Access is denied
   Exception Type: System.ComponentModel.Win32Exception

   at System.Diagnostics.Process.Kill()
   at SafeExamBrowser.WindowsApi.Processes.Process.TryKill(Int32 timeout_ms) in .\SafeExamBrowser.WindowsApi\Processes\Process.cs:line 103

2025-10-17 11:36:55.775 [12] - INFO: Client process has terminated.

Now, EpmClientStub is not a part or component of Safe Exam Browser itself, so this might be an issue with resp. on your machines.

[x3VILBaconx]

I appreciate the response! Turns out microsoft is having epm issues: https://learn.microsoft.com/en-us/intune/intune-service/protect/epm-known-issues. removed this policy and the 3.10 version issues are gone.

my last request: is it possible to get an msi for the 2.4.1 version? Only thing I can find is an exe on the github/seb website. I was looking to get it uninstalled, unfortunately the msi that was given from linkit (from 5 years ago), has issues with uninstalling:

I was hoping to get the msi, host it on a network share, and create a script to get this removed (by having it point to this msi).

[dbuechel]

Unfortunately not, the only artifact we have left from version 2.4.1 is the installer (.exe) hosted on SourceForge. From what I know, the MSI can be extracted from it with one or a few commands of (I might be mistaken) msiexec, but I unfortunately do not remember which ones resp. how exactly.