Premiere Pro: Not Playing Timeline, Not Rendering Full Sequence, Stalling on One Frame

Question

2013 iMac // 10.9.3 // Premiere Pro CC 2014 (latest update)
I have been editing a project for a few days, and it just started giving me issues on my last run through it before exporting.
I have dealt with many problems with PP before, but I honestly don't even know what's going wrong here. I cannot pinpoint the issue. It seems to be a number of things. I started by updating PP and CUDA. Nothing. So I continued.
1) I was having problems rendering, so I figured I'd delete the preview files and start from scratch. When rendering the entire project, it would get to about 60%, then stop and hang there. After five minutes of watching it, I would quit PP. Even though it would look like it had quit, it would still be running in Activity Monitor and the little light underneath it in the dock would be on, so I have to force quit.
2) It was odd because the spot where it stops rendering is the sport where, if I scroll through the timeline, the Program window will freeze on one frame. Then it doesn't matter how much I move the playhead, it won't show any other frames. Nor will the sequence play at all after this. So I'd quit again.
3) I went back to another project and rendered everything in it - fine and dandy.
Why is this giving me such a problem? If anyone needs anything else from me to properly diagnose this, please just say so! Thanks for the help.

Answer 1

Sorry 'bout the time lag. Our new firm just started its first large project, and as the tech geek for the photo-part of it, been kinda busy.
So there's clearly a problem with the project file having gotten corrupted, but ... when it hits the footage it choked on before, it choked again. There's some kind of glitch here that has to to with PrPro interacting with those files. I'm wondering if a file header somewhere has a digit that can confuse PrPro or something? I do recall a couple issues of a similar nature that eventually involved people sending a bit of the nasty footage to an Adobe staffer, who poked through behind the scenes and found something that was not exactly what it might best have been in a header or something. Altered that, PrPro & footage liked each other again, everybody else happy. But that's the sort of ish that one needs experience at ... and I've got none.
There's been times also where people have split a project up ... right on the edge of the Problem. Three parts to their project, in separate project files. First "good" part, and rendered it out as a separate project. Next project, the "troubled" footage that worked by itself, as again its own project, and rendered out. Then the final & also untroubled part, again rendered out. I've heard of both taking those into QuicktimePro (if appropriate codec) and uniting in one continuous piece, I've also heard of people who took three PrPro projects that had been rendered out separately (if I recall one was probably about six parts, a long & complex bugger) and brought those rendered-out parts back in to make a final project with everything in it. In fact, there are a number of people who split their larger projects into chunks, that are finished separately, then combined in a final PrPro project for final polishing as their normal work habit.
Best wishes ...