grey thumbnails in bin

[getho]

Why is it some projects work fine, and others are flaky as all buggery?

Current one is pretty big, but I'm having to re-start it every hour at least, and ditch my media caches in order to keep the thumbnails

Also why does premiere not generate thumbnails for a whole bin, either than just the portion that is on screen?  The is mind bendingly stupid and annoying.  And it will re-generate them if you jump out to another bin and back in again.

[Michael Grenadier]

well it might help if you gave us some context...  Please tell us your system specs: OS version, Premiere version, amount of RAM, Hardware specs including graphics card and also tell us your source properties.    and how big is big?