WWW download had an error:Couldn't move cache data

Code (csharp):

1. WWW download had an error:Couldn't move cache data 'C:/Users/b101324/AppData/LocalLow/Unity/WebPlayer/Cache/Temp/8a279268c9b39e14c9261fbc20c13358' into place 'C:/Users/b101324/AppData/LocalLow/Unity/WebPlayer/Cache/Shared/84f5c2bef2be08fa2b0620a62497f9336c0c1425' when caching AssetBundle

Never seen this before and couldn't find any info either. Anyone know what might cause this?
I cannot reproduce it - it only popped up on our logs twice from the same user.

 

I had the same issue, sadly there is no documentation about the WWW error messages.
Make sure to check if Caching.ready before you start any download. By doing so the problem should disappear.

 

This just started happening to me as well, as of today, and it's happening consistently, even in old versions of code that I had working weeks ago.

 

Caching.ready took care of it indeed...thank you.

Code (csharp):

1. while (!Caching.ready)
2.     yield return null;
3.  

 

When is this needed? Before every download or only once?

 

I added the while to our code, but it doesn't help, I keep getting error reports that cache data couldn't be moved.

Any other possible causes?

 

Had this issue with 5.3.7p4, and had the caching while-loop already..

seems like this was causing the error message:

Code (CSharp):

1. Caching.CleanCache();

was doing cache cleaning always before loading, while testing models..

but was also loading multiple models at the same time,
loading 2 separate models at the same time had no issues,
but loading same model twice caused that cache error..

 

Wow, have been running with some race condition with Addressables, and it seems this fixed the issue!