Thanks to squarebox support’s super fast response here’s what they said:
i think your workset file may have become corrupt this is the list of all your worker tasks
to fix stop the worker rename the file from workset.xml to something else – eg workset_old_feb27.xml and either restart worker which will automatically create a new workset file or replace it with the workset.bak file
you’ ‘ll find the workset file here
The worker.xml and workset.xml files are located at:
PC
C:\Users\?USER NAME?\AppData\Local\Square Box\worker.xml
C:\Users\?USER NAME?\AppData\Local\Square Box\worksetr.xml
MAC
MAC /Users/?USER NAME?/Library/Application Support/worker.xml
MAC /Users/?USER NAME?/Library/Application Support/workset.xml
cheers dougal