Project crashes on launch 4.7p8

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1

Hi,

I’ve tried to open a project in 4.7p8 and found the following exception error:

The thread 0x1974 has exited with code 0 (0x0).
First-chance exception at 0x00007FFFDB1229F9 (UE4Editor-Core.dll) in UE4Editor.exe: 0xC0000005: Access violation reading location 0xFFFFFFFFFFFFFFFF.
Unhandled exception at 0x00007FFFDB1229F9 (UE4Editor-Core.dll) in UE4Editor.exe: 0xC0000005: Access violation reading location 0xFFFFFFFFFFFFFFFF.

When opening the debugger in Visual studio it points to:

UnrealEngine\Engine\Source\ThirdParty\IntelTBB\IntelTBB-4.0\src\tbbmalloc\frontend.app

And stops at line 2059:

/* Get a block to try to allocate in. */
    for( mallocBlock = bin->getActiveBlock(); mallocBlock;
         mallocBlock = bin->setPreviousBlockActive() ) // the previous block should be empty enough
    {
        if( FreeObject *result = mallocBlock->allocate() )
            return result;
    }

Is this something that is a problem in my project?

2

Hey MrMastermindNL-

Is the project you’re trying to open converted from another engine version? Do you receive the same error when trying to launch a new project? If there are any other steps to reproduce the error you’re seeing, please let us know to help determine the cause.

Cheers

3

Hey ,

Yes it was a converted project from 4.6.1. When launching a new project, there is no problem. I’ve been trying to open the project since preview 5 hoping it would work again, because I forgot to make a copy.
I’m still hoping I can fix the project. But since it is a prototype project, I will recreate it if I can’t get it to work again.

4

Could you post the callstack from when the crash occurs as well as the project’s log files from the crash? This will give us an idea of where the crash is occurring. The log files are located inside the Saved->Logs folder of the project directory.

5

Hi ,

Here’s the logfile. I never looked at the logfiles before, very usefull :slight_smile:

link text

I love how I learn new stuff about the engine every day!

6

Hey MrMastermindNL-

The log you posted doesn’t include where the fatal error is occurring. To make sure this information is included you should get the log file immediately following when the crash happens.

Additionally, do you still have a copy of the project for 4.6.1? If so does it crash if you create a new 4.7 preview 8 copy without going through the other preview versions?

7

Hi ,
Sorry for the wait. I did not make a copy of the project in .4.61. I did not get a crash on newly created projects in 4.7p8. I’m now updated to 4.7.1 where the project also crashes. I’ve attached the log immediatly after the crash.
If there’s nothing we can do about it, no worries. We’ll just close this issue and I will recreate the work in a new project and I’ll try to copy as much content in from this project as I can.
link text

8

I rebuilt the project in 4.7.1. There’s 1 blueprint class that causes the crash. So I think I have to redo that one.

9

Hey MrMastermindNL-

Looking at the log files it appears that the error was caused when trying to set the static mesh for BP_Celing_C_1 and BP_Celing2, possibly caused by a reference link being broken during the conversion. Remaking the blueprint will create new references which should solve your issue.

Cheers