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Deleting Collections folder locks UE

Current version of UE 4 becomes unresponsive when the "Collections" folder that resides in "Content" is deleted by user while the project is opened.

When I run from the source, I found out that UE4 tries to access this folder, but cannot and stucks in a loop. Here is what is printed to log:

 [2016.10.06-10.20.59:377][914]LogDirectoryWatcher: A directory notification failed for 'D:/Unreal/<redacted>/Content/Collections/' because it was empty or there was a buffer overflow. Attemping another request...

This is logged thousands of times in just a few seconds. If a directory cannot be found then it should be created.

Product Version: UE 4.13
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asked Oct 06 '16 at 10:31 AM in Using UE4

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emrahgunduz
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avatar image Doug E ♦♦ STAFF Oct 06 '16 at 03:07 PM

hey emrahgunduz-

Can you provide the setup that causes this issue? When I create a new project and turn on Show Collections in the Content Browser's View Options, the list of collections is empty by default. Adding a new collection and deleting does not cause the editor to freeze or become unresponsive. Any additional information you can provide to help me reproduce the issue on my end would be helpful.

avatar image emrahgunduz Oct 07 '16 at 09:14 AM

no no :)

create a new project > open the project in ue 4.13.1 > on windows explorer, go to the project's content folder > delete the Collections folder > unreal freezes...

avatar image Doug E ♦♦ STAFF Oct 07 '16 at 01:13 PM

Hey emrahgunduz-

Removing files form a program's directory while that program is running is always likely to cause the program to react negatively. This type of behavior is expected when altering files outside a program when the program is running. If you need to delete project files, it is best to close the program before deleting files/folders.

Cheers

Doug Wilson

avatar image emrahgunduz Oct 07 '16 at 02:19 PM

then epic must definitely correct the empty folders problem in ue 4. currently right after deleting an asset inside ue4, causes the empty -- previously deleted folders to reappear, which cause a lot of troubles on asset management.

these empty folders never get deleted on os level, and if we remove them most probably the editor hangs.

avatar image Doug E ♦♦ STAFF Oct 07 '16 at 02:58 PM

I am not seeing an instance of deleting an asset causing a deleted folder to reappear inside the editor. Are you deleting the asset from inside the project or through Windows Explorer window? Can you elaborate on what you mean by the "empty folder problem"?

avatar image emrahgunduz Oct 07 '16 at 03:45 PM

I've recorded the situation. Here is the link to the video: https://youtu.be/4hH4F8tn8bc

As you can see, deleted empty folders re-appear on editor restart. In most cases, they re-appear when I delete an asset inside the editor (while recording the video I could not re-create the condition for this case).

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1 answer: sort voted first

The issue of the folders reappearing after reopening the project has already been fixed internally and will be available in a future update to the engine. You can find the public issue for this here https://issues.unrealengine.com/issue/UE-11796

Cheers

Doug Wilson

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answered Oct 07 '16 at 05:28 PM

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