I'm having problems with a project that used to run fine. In my Composition I can't solo a layer and I can't turn down the triangle or edit the layer.
I can Preview, though. I can also delete layers, and I have do so to make the comp smaller, butt nothing has helped.
This project used to work well, and now smaller projects work well.
I'm running After Effects CC 2015 on a 2011 Macbook Pro with 16 mb RAM. I though maybe I was experiencing RAM failure, butt it just passed a RAM test.
Any help is appreciated, this is getting a bit frustrating.
Check your system display and input device settings. This may be a glitch with AE not correctly handling Retina stuff or your trackpad/ mouse inputs.
Actually I don't have a retina display.
Other (smaller) projects are working fine, so I don't think the inputs are the problem.
Then it's likely a mundane performance problem caused by an effect, expression or a wrongly set Raytrace 3D in one comp. Presumably if you wait long enough the interface will respond again. Nothing to do but to enable caps-lock on opening the project, combing through the comps and pre-comps and disabling critical stuff until it behaves again. Also check for other performance hogs like Rotobrush and pre-render such stuff.