Error: "Tried to read the folder contents...but could not" I'm stumped on this one, for the longest time when I clicked the "Clear Caches" button in the CP, everything seemed to be ok. But I recently checked the craft.log after noticing things didn't seem to be clearing out after all. There was this error:

2016-02-16 09:25:11

Level   error
Category    application
Message Tried to read the folder contents of /home/[company-name]/craft/storage/runtime/temp/, but could not.
2016-02-16 09:25:11

Level   error
Category    application
Message Tried to read the folder contents of /home/[company-name]/craft/storage/runtime/assets/, but could not.
2016-02-16 09:25:11

Level   error
Category    application
Message Tried to read the folder contents of /home/[company-name]/craft/storage/runtime/cache/, but could not.


The permissions are as follows:

/craft 755
  /storage 777
     /runtime 777
        /temp 777
           empty
        /assets 777
           empty
        /cache 777
           09f795de983f214fb0e9188dd884ec27.bin 664
           +another 26 of the same - these don't clear when I click the clear cache button


I tried changing the 664 to 777 but it reverted itself back to 664.

Any thoughts are appreciated!
Try changing the 664 through SSH instead of manually. These three folders need the right permissions:


craft/app/ 
craft/config/ 
craft/storage/


source: https://craftcms.com/docs/installing

Edit: Have you tried removing the content of the Cache?