The error message above states that the file experiment is missing. This file is usually generated on your computer by our wrapper. For that the file 'experiments.orig' is modified according to the progress of your WU and save as 'experiment'.

Somewhere in this process something goes wrong and consequently the mentioned error message appears. Right now it is quite hard to find the reason of your trouble. This error is really rare and didn't occur in that high frequency on a single host before.

A first guess is, that your hard disc is full or that the portion of the boinc data exceeds your predefined hard disc limits.