MCPC+ possible .jar problems?

[RagingBearFish]

Error writing to server: [Errno 28] No space left on device

I get this error in my multicraft console, they give a solution to it, but I'm not really sure how to do it, as in I cannot find the file to edit to make the change. As far as I know this deals with emptying out the temp files and a temp fix is just to restart.

[RagingBearFish]

I've removed MCPC and replaced with bukkitforge, seems to be a bit smoother.