Sourcetree is failing to start

Question

1. Open SourceTree 2. Displays flash screen 3. Then nothing Tried to clear everything (uninstall) and deleted below folders /AppData/Local/Atlassian/SourceTree /AppData/Local/SourceTree then install the latest version (3.4.9) same problem. Below is the error I've got ERROR [2022-08-12 15:32:41,280] [1] [Sourcetree.Composition.VSMef.Net48.VSMefCompositionManager] [Log] - Unable to load MEF components System.IO.FileNotFoundException: Could not load file or assembly 'System.Diagnostics.Tracing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified. File name: 'System.Diagnostics.Tracing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' at System.Threading.Tasks.Dataflow.TransformBlock`2..ctor(Func`2 transformSync, Func`2 transformAsync, ExecutionDataflowBlockOptions dataflowBlockOptions) at Microsoft.VisualStudio.Composition.PartDiscovery.CreateDiscoveryBlockChain(Boolean typeExplicitlyRequested, IProgress`1 progress, CancellationToken cancellationToken) at Microsoft.VisualStudio.Composition.PartDiscovery.CreateAssemblyDiscoveryBlockChain(IProgress`1 progress, CancellationToken cancellationToken) at Microsoft.VisualStudio.Composition.PartDiscovery.d__10.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() at Sourcetree.Composition.VSMef.Net48.VSMefCompositionManager.d__5.MoveNext() WRN: Assembly binding logging is turned OFF. To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1. Note: There is some performance penalty associated with assembly bind failure logging. To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].

Maged Sallam · Answer

Thanks so much,, this worked for me :)

rohanatcomet · Answer

Hi Maged Sallam,

I managed to solve this issue. I realized this issue indeed is dependent on recent windows update messing up WMI classes.  I found a post from this issue :

https://jira.atlassian.com/projects/SRCTREEWIN/issues/SRCTREEWIN-13875?filter=allissues

which leads to this Article https://techcommunity.microsoft.com/t5/ask-the-performance-team/wmi-missing-or-failing-wmi-providers-or-invalid-wmi-class/ba-p/375485

that helped me to resolve the issue.

e.g. In my case, after windows updates,  I had error WMI Invalid Class.  You can verify this, by :

* Go to start-run and type in wmimgmt.msc
* Right click on Local Wmi Control (Local)and select properties
* In General Menu, you would see some error WMI Invalid class or namespace if there is any. If there is no errors then you can skip this post completely because then you would have different issue.
* If the issue is there as described in point 3. For Example, WMI Invalid Class. You can stick with the mentioned Article or follow below steps(which is also from same article explicitly for Error Win32_Processor:WMI Invalid Class and Win32_WMISetting: WMI Invalid Class. 
* Find the Provider it from www.msdn.com i.e. for mentioned example, it is CIMWin32  (Refer : https://docs.microsoft.com/en-us/windows/win32/cimwin32prov/win32-processor )

* Verify if WMI Repo is consistent : Check if the repository is corrupted or not by running following command from command prompt with admin rights: winmgmt /verifyrepository

* If Step 6 is consistent then next, run command, in already opened CMD prompt: cd C:\Windows\System32\Wbem

* Next Install the Missing Class Provider for mentioned example by running: mofcomp.exe CIMWin32.mof

* Reregister installed wmi class by running :  regsvr32 CIMWin32.dll

* close wmimgmt.msc and restart it. In general , now if the error is resolved and then there would not be same error as found in step 3. I would of added some snapshots but i could simply not copy paste so please dont mind ;)

rohanatcomet · Answer

Deleting this post- Check the other recent answer.