Render won't finish

So I’m working on a grass file, and when I render, the render appears to finish, but the bar at the top goes back to the beginning once it fills up, and the bar below that with all the information does not display what it does when finished, but instead says “part 135-135” at the end. This even occurs when I make render the scene without the particle systems. I am using Blender Internal and would appreciate any help.

Oh, and it seems to render other files just fine.