The error code you're seeing is likely STATUS_INVALID_NETWORK_RESPONSE:
http://msdn.microsoft.com/en-us/library/cc704588(PROT.10).aspx
Without knowing a lot more about your application, I can't say for sure why you're seeing it. However, my best guess is that your network or file server sometimes has difficulties when a task is trying to access it for both the application executable and
the data file. Since you're only using one node, you could try copying the app and data locally, and trying the job again.