Hi Romain,   Sorry, I didn't get back to you sooner, other problems dragged me away.  To answer your questions   1) No changing dependencies, they are all static, either jars, scripts, or HQL scripts, all stored on HDFS 2) I was not able to get any logs, but I do remember it would go to 500 error page, and when I would look at the log, there was a python exception looking for a jar that was used by an entirely different workflow. I did try to run it again, and it looks like the situation has gotten worse, not sure what has changed.  Now when I go into the same workflow that errored out on the submit, an Error message popup appears, with:    Error loading workflow: get() returned more than one Link -- it returned 2! Lookup parameters were {'name': 'related', 'parent': }   3) All of the workflows are personal, I am not sharing any workflows with anyone   I have seen this before, and the really bad solution I would use then was to recreate the workflow with a new name and it would be okay.  But I am reluctant to do that here, because this is a pretty big workflow.   Thanks in advance ... View more