You're correct, simply clicking on a clip (After Effects and Photoshop use layers, Premiere Pro uses 'clips') should not cause it to go unrendered. Normally, you'd have to change something to lose that rendered state.
Does anyone know why this would happen?
What happens if you click 'Undo' (Ctrl/Cmd+Z)?
Nothing, renders don't come back. There is nothing in History to Undo anyways - but yes, I tried that.
I just did a test. It appears this is only happening for projects that are on the network - even though the renderings are local.
Project files: Network
Render Cache: Local
This didn't used to happen, so something is wrong. I don't see why the project being on a network share would affect PPro losing it's local preview files.
Weird things happen when you involve a network. Common advice is to simply not do that.
The loss of the links to the Rendered files is common with either Network drives, or some externals. I do not recall hearing of it, with local drives. Can you relocate your Render Files to a local drive?
That is what I've thought Bill. My cache/previews are on a local drive. My setup is always:
Program: main drive (SSD)
Cache for Previews: local 10k Sata
Project Files: NAS 2Gbit
Connection: 2Gbit through a procurve switch
Anyway, I might have fixed it. For those that run into this, here are the steps I took:
#1 Uninstall Premiere Pro from your Collection.
#3 Reinstall Premiere Pro - this will probably fail with fatal errors like mine.
#4 Call Adobe support, short wait, get transferred around, then disconnected.
#5 Call Adobe support back and wait 25 minutes to talk to someone
#6 Give up on that.
#7 Uninstall the entire Master Collection and remove preferences
#9 Install the entire Collection
#10 During long install took bubble bath and watched Bodyguards & Assassins on Netflix
#11 Install done - like many others will install with warnings (I got the cd-roms when they upgraded me... maybe they are bad)
Note: You don't have to follow those steps *precisely*, as for example maybe you have already seen Bodyguards & Assassins, so another movie can be substituted.
So far so good. We'll see how long it lasts... who knows, maybe I'll be back in an hour :-) If it continues to work, then I might be able to point me finger at some fairly recent Mobo updates - the only variable I can think of.
By the way, thank you for understanding Bill. I never understood those that think it's okay to buy non-consumer gear in 2011 and feel they have no choice but to work like it's 1995.