# Editor Crash Running Frontend Session **URL:** \ **Category:** Programming & Scripting\ **Tags:** unreal-engine\ **Created:** [December 12, 2020, 11:14pm UTC](https://forums.unrealengine.com/t/editor-crash-running-frontend-session/475818 "2020-12-12T23:14:08Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![anonymous\_user\_0da73ff6](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_0da73ff6](https://forums.unrealengine.com/u/anonymous_user_0da73ff6)\ **Post date:** [December 12, 2020, 11:14pm UTC](https://forums.unrealengine.com/t/editor-crash-running-frontend-session/475818/1 "2020-12-12T23:14:08Z")
![324618-bug.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/1/5/f/15f76804878a1f4034fd504704160b43ae5e1436.png) I’ve discovered some very strange behavior with my Session Frontend. This is the first time I’ve ever used the session frontend in this project and one of my first times ever, but whenever I open it via **Window → Developer Tools → Session Frontend** my .sln reports this error as I am running the editor: **Exception thrown at 0x00000000680C4361 (dbghelp.dll) in UE4Editor-Win64-DebugGame.exe: 0xC0000005: Access violation reading location 0x0000000000000000.** I’ve tried building UnrealFrontend via my UE4 source build solution and as well as my project solution and have been able to **successfully run Unreal Frontend standalone**. However doing it via editor crashes. **Steps to Reproduce:** 1. Run debugger for UE4 4.26 project via VS 2019 2. Open Frontend Session via Window → Developer Tools → Frontend Session 3. Wait a few seconds 4. See a breakpoint hit with exception Top function call in the call stack is if( SymGetSymFromAddr64( ProcessHandle, ProgramCounter, nullptr, Symbol ) ) in Engine\Source\Runtime\Core\Private\Windows\WindowsPlatformStackWalk.cpp Followed by a bunch of other non-project calls. I’m not sure where to find the crash dump or log files, its not in the project Saved/Crashes nor is there a crashes folder in the UE4 source build Saved directory If this is helpful, the last thing in the output before the crash is: ‘UE4Editor-Win64-DebugGame.exe’ (Win32): Loaded ‘C:\Windows\System32\psapi.dll’. ---
**Author:** ![nioannides](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@nioannides](https://forums.unrealengine.com/u/nioannides)\ **Post date:** [December 17, 2020, 1:20pm UTC](https://forums.unrealengine.com/t/editor-crash-running-frontend-session/475818/2 "2020-12-17T13:20:27Z")
I get the exact same crash with 4.25 ---
**Author:** ![RemRemRemRe](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/remremremre/32/974428_2.png) [@RemRemRemRe](https://forums.unrealengine.com/u/RemRemRemRe)\ **Post date:** [January 4, 2021, 8:57am UTC](https://forums.unrealengine.com/t/editor-crash-running-frontend-session/475818/3 "2021-01-04T08:57:23Z")
I encountered this exception in “ **FSourceCodeNavigationImpl::NavigateToFunctionSource** ”. Which means every time I double clicked a blueprint node and try to find it’s definition in c plus plus, it would trigger this exception. **My solution:** Delete or rename dbghelp.dll in **UnrealEngine\Engine\Binaries\ThirdParty\DbgHelp** folder ---
**Author:** ![anonymous\_user\_0d5d0b83](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_0d5d0b83](https://forums.unrealengine.com/u/anonymous_user_0d5d0b83)\ **Post date:** [January 5, 2021, 3:38pm UTC](https://forums.unrealengine.com/t/editor-crash-running-frontend-session/475818/4 "2021-01-05T15:38:46Z")
Hello, We’ve made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue. Thanks ---
**Author:** ![DaveCSumo](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@DaveCSumo](https://forums.unrealengine.com/u/DaveCSumo)\ **Post date:** [January 14, 2021, 7:08pm UTC](https://forums.unrealengine.com/t/editor-crash-running-frontend-session/475818/5 "2021-01-14T19:08:53Z")
The version of dbghelp.dll supplied with the engine is soooooooooo old it can’t handle the latest debug info output by the compiler. My Visual Studio 2019 updated yesterday to 16.8.4 and looks like it came with a new dbghelp.dll so I copied that into the engine folder and no more crashes. On mine, the new dll was in C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\Team Tools\Performance Tools and copied it into Engine\Binaries\ThirdParty\DbgHelp The one supplied with the engine was 6.11.1.404 and the latest I replaced it with was 10.0.10150.0 ---
**Author:** ![Burnrate](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Burnrate](https://forums.unrealengine.com/u/Burnrate)\ **Post date:** [January 19, 2021, 12:47am UTC](https://forums.unrealengine.com/t/editor-crash-running-frontend-session/475818/6 "2021-01-19T00:47:54Z")
Did you ever figure this out? I’m still getting it in 4.26 EDIT: Oops, I somehow missed the fix by DaveCSumo! ---
**Author:** ![ArcainOne](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@ArcainOne](https://forums.unrealengine.com/u/ArcainOne)\ **Post date:** [January 19, 2021, 3:32am UTC](https://forums.unrealengine.com/t/editor-crash-running-frontend-session/475818/7 "2021-01-19T03:32:13Z")
Thank you DaveCSumo! This fixed my Session Frontend which was crashing in a custom 4.25 engine! ---
**Author:** ![gobo\_prosser](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@gobo\_prosser](https://forums.unrealengine.com/u/gobo_prosser)\ **Post date:** [January 21, 2021, 7:01am UTC](https://forums.unrealengine.com/t/editor-crash-running-frontend-session/475818/8 "2021-01-21T07:01:12Z")
Thank you, this fixed my issue after updating to VS 16.8.3 ---
**Author:** ![DaveCSumo](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@DaveCSumo](https://forums.unrealengine.com/u/DaveCSumo)\ **Post date:** [January 21, 2021, 9:59am UTC](https://forums.unrealengine.com/t/editor-crash-running-frontend-session/475818/9 "2021-01-21T09:59:18Z")
Also make sure you copy the correct version - for us it was the one in the X64 subdirectory. ---
**Author:** ![Helghast](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Helghast](https://forums.unrealengine.com/u/Helghast)\ **Post date:** [January 25, 2021, 12:22pm UTC](https://forums.unrealengine.com/t/editor-crash-running-frontend-session/475818/10 "2021-01-25T12:22:36Z")
This solution has worked for me. Deleting the DLL loads the Windows one, and UE4editor opens all fine with the SessionFrontend open. ‘UE4Editor.exe’ (Win32): Loaded ‘C:\Windows\System32\dbghelp.dll’. ---
**Author:** ![Xyzyx](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Xyzyx](https://forums.unrealengine.com/u/Xyzyx)\ **Post date:** [January 26, 2021, 3:54pm UTC](https://forums.unrealengine.com/t/editor-crash-running-frontend-session/475818/11 "2021-01-26T15:54:56Z")
I deleted Engine/Binaries/ThirdParty/DbgHelp and now debugging works fine for me. Thanks