I added a new array field to a struct “SystemConfig” which is used in most of my blueprints. You’ll see the log complains about various Make nodes for this struct not having an input for that field, but when I try to open any of those blueprints to fix the problem, the editor crashes.
After all the blueprint errors the log shows a Fatal Error “Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0xffffffff”
I tried opening visual studio and doing a full rebuild on the project but it didn’t make any difference.
Hello,
I was unable to reproduce this issue on our end. I have a few questions that will help narrow down what issue it is that you are experiencing.
Quick questions:
- Can you reproduce this issue in a clean project?
- If so, could you provide a detailed list of steps to reproduce this issue on our end?
- Could you provide screen shots of any blueprints that may have been involved in this issue?
Suggestions for getting your project back up while we investigate your issue.
- Trying booting up your project be for the changes that broke it via the backup files. These are automatically generated. The default path is: (C:\Users\YourUserName\Documents\Unreal Projects\YourProjectName\Saved\Backup)
- Try migrating your blueprints to a clean project. This can be done by right clicking the asset > Asset Actions > Migrate Assets.
- I tried doing something similar in a new project but the issue was not reproduced.
- The editor crashes trying to open any of the related blueprints so I can’t screenshot them.
- I tried to migrate the blueprints to another project, but even right clicking on an affected blueprint crashes the editor.
The project is in source control so I have other revisions I can go back to if the problem is not fixable
Hello,
Would it be possible for you to send me a copy of the project that you are having issues with? This way I will be able to take a closer look at the problem.
try this SFTP login
Try compiling the latest 4.7 branch from github yourself (or wait for official release of 4.7.3), there some struct circular dependency stuff is fixed. I guess it may solve your problem.
Hello,
I was wondering if you had upgraded to 4.7.3 and weather of not that has made any changes in respect to this issue?
After upgrading to 4.7.3 the editor in this project still crashes every time I try to open or right click on the affected blueprints, or click Play
Hello,
I was unable to gain access to your project with the post before. Could you zip it down and send it to me via dropbox or google drive so that I can take a closer look?
Hello,
I was able to get your blueprints open on my end after renaming your blueprints folder to “TestBlueprint”, this appears to have broken the references inside the blueprints. However, now they can be opened. Please let me know if this works for you.
Renaming the folder from the editor just crashes the editor – but renaming the folder directly on the filesystem worked, and now I can open the blueprints! However, it didn’t just break the references, but actually removed any variables using the types it can’t find, so many random nodes are missing from the graphs with no easy way to restore them. But at least the remaining issues can be fixed via the editor. Thanks for your help.
Hello,
I understand that this was not an ideal workaround for the issue that you were experiencing. I am going to mark this issue as resolved for now. If you experience this issue again please feel free to reopen this thread with any additional information that you may have. Also, if you happen to find away to reproduce this in a clean project I will be more than happy to send the test case to the developers for further review.