I just started Maya after a few weeks away from the it. I go to render some single frames shots of some of my animations, and nothing happens. All I get is, at the bottom, "rendering in mental ray..." that's it! Nothing happens after that, no showing of the % done or error messages. I have my "windows task manager" open, and I watched the mayaBatch.exe, it would hit almost full cpu usage for a second or two, then it quickly plummets to zero and stays there. I have tried everything! The same thing happens with soft and hardware render, rendering to tif, iff, jpeg, targa... and various combinations.
It was fine a few weeks ago, but now I am totally at a loss.