BUG: A meta data file (.meta) exists but its asset 'Assets/StreamingAssets/aa' can't be found

Peter77 · April 13, 2020, 3:58pm

Building a Windows Standalone Player with Unity 2019.3.7f1 and Addressables 1.7.5, causes the Addressables System to output the following warning always:

The entire related log is:

Copying Addressables data from Library/com.unity.addressables/StreamingAssetsCopy/aa/Windows to C:/Users/crash/Documents/TestProject/Assets/StreamingAssets/aa/Windows.  These copies will be deleted at the end of the build.
UnityEngine.Debug:Log(Object)
AddressablesPlayerBuildProcessor:OnPreprocessBuild(BuildReport) (at Library/PackageCache/com.unity.addressables@1.7.5/Editor/Build/AddressablesPlayerBuildProcessor.cs:37)
UnityEditor.BuildPipeline:BuildPlayer(BuildPlayerOptions)


Deleting Addressables data from C:/Users/crash/Documents/TestProject/Assets/StreamingAssets\aa.
UnityEngine.Debug:Log(Object)
AddressablesPlayerBuildProcessor:CleanTemporaryPlayerBuildData() (at Library/PackageCache/com.unity.addressables@1.7.5/Editor/Build/AddressablesPlayerBuildProcessor.cs:26)
AddressablesPlayerBuildProcessor:OnPostprocessBuild(BuildReport) (at Library/PackageCache/com.unity.addressables@1.7.5/Editor/Build/AddressablesPlayerBuildProcessor.cs:17)
UnityEditor.BuildPipeline:BuildPlayer(BuildPlayerOptions)


A meta data file (.meta) exists but its asset 'Assets/StreamingAssets/aa' can't be found. When moving or deleting files outside of Unity, please ensure that the corresponding .meta file is moved or deleted along with it.

Looking at the AddressablesPlayerBuildProcessor.CleanTemporaryPlayerBuildData code shows this line:

Directory.Delete(addressablesStreamingAssets, true);

… which deletes the directory, but not the .meta file of that directory.

Reproduce

Build Windows Standalone Player
Unfocus / Focus Unity editor

Please fix that you also delete the .meta afterwards to avoid getting the warning with every build.
Is there a way to turn off the “Copying Addressables data” message? I understand that’s important to output warnings and errors, but this log isn’t particular useful to me.

PS: No idea why Unity generates .meta files for files inside the StreamingAssets directory, this could be another bug. But it’s been like this always.

TreyK-47 · April 16, 2020, 6:49pm

I’ll flag this for the team to check out! If you haven’t yet, please also file a bug report with us. That process is detailed here: Unity QA: Building quality with passion

Peter77 · June 22, 2020, 8:49am

I updated Addressables to 1.10.0, the issue described above still persists.

Ofx360 · June 26, 2020, 4:10pm

I’m being annoyed by this issue as well, but i don’t need to build anything. StreamingAssets was auto added to my directory (not sure why/when) and Addressables has been complains about it every time refresh my code:

I’ve deleted the folder and the errors have stopped. And the folder doesn’t seem to come back.

Edit: Nevermind, the folder and error messages came back on build

ProtoTerminator · June 26, 2020, 8:44pm

That’s because they copy aa to streaming assets in the pre-build process, then delete it in the post-build process. Unity itself can generate the meta file within that process that Addressables is not accounting for.

Lex4art · August 16, 2020, 6:09pm

Bug still there in Unity 2020.2a19 + Adressables 1.13.1

Reshima · September 9, 2020, 6:27pm

I have no idea what StreamingAssets/aa is so it’s quite annoying to have it created in my project files and also getting the warning in my console all the time. Any solution to this?

c0nd3v · September 13, 2020, 9:18pm

Fix it already!!!

davidla_unity · September 15, 2020, 4:05pm

Hey all, StreamingAssets/aa is where we copy the AssetBundles from the ScriptableBuildPipeline build into StreamingAssets for local bundles when doing a player build. Since there’s no need to constantly have that in your Assets folder we clean it up after the player build.

I’ll add a ticket for us to be sure to cleanup the meta file but in the meantime if you want to add this snippet to AddressablesPlayerBuildProcessor.CleanTemporaryPlayerBuildData it should clean that up for you.

string metaPath = "Assets/StreamingAssets/aa.meta";
if(File.Exists(metaPath))
  File.Delete(metaPath);

Peter77 · December 16, 2020, 3:03pm

I can no longer reproduce the issue with Addressable 1.16.15. I assume it has been fixed. Thank you!

a_loupas · January 12, 2022, 12:32pm

Hi.

I am facing a similar problem (or maybe not).

error: Callback provided streaming assets file conflicts with file already present in project. Project file ‘StreamingAssets/aa/catalog.json’. Callback provided file ‘Library/com.unity.addressables/aa/WebGL/catalog.json’.
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)

co43687 · May 29, 2022, 9:03am

i solved it. it happens when using addressable updated from 2020ver to 2021ver. you need to delete the filename: StreamingAssets in Asset folder.