Blog and plugin updates

Hi,

On some of my sites I an able to update to WP 4.4.x. In fact some of the auto updates go fine.

On other sites, as well as some plugin updates, I keep getting this error message: ‘Download failed. Failed to write request to temporary file’.

Any ideas why everything is fine on some and others not so good? Wish I had the tech knowledge to figure this out but I don’t.

Bob M