Unable to load projects (Fresh Install)

Hello. I am a new user to Unreal Engine 4 (like, seriously fresh off the graphic design boat, never coded anything beyond a simple website fresh.

Installed UE 4.10, no problems during install; however, I tried to created a new puzzle project from the templates, and now I always get this same error on load:

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UE4Editor: [2016.02.15-08.16.46:889][ 0]LogFileManager:Warning: ReadFile failed: Count=0 Length=1701668637 Error= for file /Users/UserName/Library/Application Support/Epic/UnrealEngine/4.10/DerivedDataCache/Boot.ddcAssertion failed: (Index >= 0) & (Index < ArrayNum) [File:Runtime/Core/Public/Containers/Array.h] [Line: 678]
UE4Editor: Array index out of bounds: 0 from an array of size -1148043685
UE4Editor:
UE4Editor: [2016.02.15-08.20.41:229][ 0]LogMac:Error: appError called: Assertion failed: Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:Runtime/Core/Public/Containers/Array.h] [Line: 678]
UE4Editor: Array index out of bounds: 0 from an array of size -1148043685
UE4Editor: objc[4348]: autorelease pool page 0x7f8900845000 corrupted
UE4Editor: magic 0x00000000 0x00000000 0x00000000 0x00000000
UE4Editor: should be 0xa1a1a1a1 0x4f545541 0x454c4552 0x21455341
UE4Editor: pthread 0x0
UE4Editor: should be 0x700000081000
UE4Editor:
CommandUtils.Run: Run: Took 278.031185s to run UE4Editor, ExitCode=132
CommandUtils.RunCommandlet: ERROR: Editor terminated abnormally with signal 4
Project.Cook: Cook failed. Deleting cooked data.
BuildCommand.Execute: ERROR: BUILD FAILED
Program.Main: ERROR: AutomationTool terminated with exception:
Program.Main: ERROR: Exception in AutomationScripts.Automation: Cook failed.
Stacktrace: at Project.Cook (AutomationTool.ProjectParams Params) [0x00000] in :0
at BuildCookRun.DoBuildCookRun (AutomationTool.ProjectParams Params) [0x00000] in :0
at BuildCookRun.ExecuteBuild () [0x00000] in :0
at BuildCommand.Execute () [0x00000] in :0 InnerException in AutomationUtils.Automation: BUILD FAILED: Failed while running Cook for /Users/UserName/Desktop/FolderName/Games/FirstPuzzleTry/FirstTryFail/FirstTryFail.uproject; see log /Users/UserName/Library/Logs/Unreal Engine/LocalBuildLogs/Cook-2016.02.15-00.21.02.txt
Stacktrace: at AutomationTool.CommandUtils.RunCommandlet (System.String ProjectName, System.String UE4Exe, System.String Commandlet, System.String Parameters) [0x00000] in :0
at AutomationTool.CommandUtils.CookCommandlet (System.String ProjectName, System.String UE4Exe, System.String Maps, System.String Dirs, System.String InternationalizationPreset, System.String Cultures, System.String TargetPlatform, System.String Parameters) [0x00000] in :0
at Project.Cook (AutomationTool.ProjectParams Params) [0x00000] in :0
Program.Main: AutomationTool exiting with ExitCode=Error_UnknownCookFailure
Domain_ProcessExit
RunUAT ERROR: AutomationTool was unable to run successfully.
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Help?

I’m running OSX (10.11.3)

Hi

Can you attach the error log

/Users/UserName/Desktop/FolderName/Games/FirstPuzzleTry/FirstTryFail/FirstTryFail.uproject; see log /Users/UserName/Library/Logs/Unreal Engine/LocalBuildLogs/Cook-2016.02.15-00.21.02.txt

And any other files there

Hi chxmp,

With the editor closed, you can remove the project from the “Unreal Projects” folder and delete the DeriveDataCache folder. Restarting the editor will automatically rebuild this folder. (I recommend deleting the puzzle project altogether if you have not invested a lot of working on it.)

Users>[YourName]>Documents>Unreal Projects

Users>Shared>UnrealEngine>4.10>Engine>DerivedDataCache

Try this and let me know if it resolves the issue.

-.