[4.7.2] Editor Crashes on Converted Project With Instanced Static Meshes

Development Asset Creation
, , , , , ,
1

##Branch:
Binary/Launcher

##Build version:
Version 4.7.2

##Detailed description of the issue:

When opening my project in 4.7 - the splash screen gets to 95% Initializing before crashing.

##Repro Steps

Action 1: Create a content-only project in 4.6.1

Action 2: Create a blueprint which adds instanced static meshes via the construction script.

Action 3: Place Blueprint in a specific map

Action 4: Build Lightmass

Action 5: Convert project to 4.7

Action 6: Open map with previously created Blueprint

Action 7: Witness Crash

##System Specs:

  • Windows 8.1
  • AMD FX 8350
  • AMD 2x 7970 Crossfire
  • 16GB DDR3 RAM
  • 2x 7200RPM HDDs in Raid-0
2

Hi Kenomica,

I attempted to reproduce this but so far my projects have converted correctly. You said to create a 4.6.1 project ‘with content’ but are you using a template or just a blank project?

3

By content only - I mean a blueprint-based project. This is my main project that I’ve been working on for several months. This project was originally the TPP Template, but over several months has been completely changed.

It seems to be isolated to this project only, as I can convert other projects fine.

I wish I could provide a crash callstack to see what’s going on, but sadly none is provided.

4

I’ll continue to try to reproduce the error, but please keep in mind that we do not recommend upgrading a project to the 4.7.0 Preview unless it is just for testing/feedback purposes. Until it’s official release the preview build is considered unstable for development.

5

Thank you. I haven’t converted my project in place, it has always been as a copy. So I still have the original 4.6.1 version as I’m aware of this - I am purely doing this for testing new features / reporting bugs.

6

I’m glad to hear it, I just wanted to be sure. :slight_smile:

7

Hi Kenomica,

I attempted to reproduce this with some of my older projects that have been converted multiple times but without luck. So this seem to be confined to your main project and it could be caused by the general instability of the Preview build.

Preview 7 will be out soon. Once it is you could try retesting your project then.

If it still crashes, would you be willing to send me your project? If I can get a repro internally I can then make a report. If you are comfortable with that, you could send it by private message over the Forums.

Cheers,

TJ

8

Yeah, this project has been converted from every iteration since 4.1.

I will certainly try preview 7 when released, and if it’s still crashing I’ll send you a portion of the project.

I think if I were to send the full thing you’d be waiting until 4.9, my net is that slow haha.

Thanks for the support.

9

I gave Preview 7 a try - and almost the same thing happened - however this time it reaches 95% before the crash occurs, and even better - a callstack was generated!

Callstack

10

Anything extra is good. Could you post the Log and Dmp files that generated with the new crash?

11

Sadly I no longer get a callstack or a DMP file. It seems it hard crashes before having the chance to generate either.

The callstack only appeared the first time after installing preview 7 (and I’ve tried multiple times since then by deleting the cloned project and trying again)

Even the log file seems incomplete, but here it is : LOG

I will uninstall and reinstall 4.7 Preview 7 in the hopes I can get a DMP file

12

Same exact behaviour in preview 8

13

Hi Kenomica,

I’m sorry that it’s been a few days. I have entered this as JIRA UE-10157 in our tracking software and our developers will be investigating the issue further.

We will post back here as soon as we have an update.

Cheers,

TJ

14

Is it possible you are using content from an old sample? There are some known issues with opening very old assets with 4.7, please see this post:

15

I’m pretty sure I’m not, but I’ll certainly give those fixes a try, thank you.

16

Gave it a try with the RC of 4.7 - exact same situation.

though I have a callstack, log and DMP to show which will hopefully help.

Callstack

Log and DMP

17

I used the Command Prompt to re-save everything and sadly it didn’t solve the crash.

18

Happens still with 4.7.1

19

Do you have any blueprints in your map with instanced static mesh components that you are populating(/instancing) from construction scripts? Try deleting those and see if it helps.

I have the exact same issue as you and my testing showed such actors to be the root cause. See this forum post for more details.

20

Replied on the forum too, thank you. I’ll give that a try, since all my maps are generated with instanced static meshes.