Rebuild Thumbnails Error

[The_Sisko]

Hi,

I changed my thumbnail setting from 100px (width/height) to 150px and wanted to start a rebuild of the thumbnails.

I get the following:
[ ... ] Copy to file system directory failed.

The directory is 777 and uploading images and creating thumbnails in the frontend is working fine.

Any idea how to solve this...?

[The_Sisko]

Sorry, found it! Old files hat wrong user and group
chown -R user:group /path/to/folder
did the trick