I searched this, but no dice. Is this just a memory buffer issue?
Just did my first job with 4k .R3D files using AE CS4. Final comp size was 1920x1080 and everything was working fine, our renders as we refined the project were all half-resolution, no issues.
Rendered out the final 5 min and 30 sec video at full resolution, and I had the render choke several times (writing .TGA sequences) giving me the error message that it failed to read the frame from the .R3D source file. It I restarted the render on the same frame that failed, it would work. This seemed to happen at random intervals.
Known issue? Bug? RAM issue?