Well I am having this same problem, We just shifted from an old server to a new file server and qube was working fine on the old server but now I am getting this error in the worker log "unable to monitor process, the parameter is incorrect".
Its writing the log files but only the .hist, .qja, .xja and .sts files. No .out or .err files were created.
I have checked the permission on the share folder and qubeproxy has full permissions . The problem is that I am not getting any errors any where except this one in the worker log. Please help!!!!
We are using Qube5.2