A filled hard drive will stop your DALiM system in its' tracks, and in order to fix the problem, you need to find out where the dead weight is hiding.  Here's some common places to look.

If your root (/) partition is full:

/tmp (WEBLiNK uploads files here by default)

/var/spool/cups (old print jobs)

If your home partition is full:

/symlnks/data/6.0/output/ (the directories in here may contain old files)

/symlnks/process/6.0/defaultjob/*_data (these are temp directories created when LiTHO is used to view PDFs)

/symlnks/process/6.0/jobs/workflows/[hostname]/ (these are the TWiST hotfolder  directories-any files that were processing when the crash occurred are in here.  If there were too many, this could be how the problem occurred)

If you still need to make space:

Use this command from the terminal:

du -h

This will give you a breakdown of all of the files and subdirectories in your current location, as well as a total space amount.  You can use the command with an absolute path to help refine your search, for example:

du -h /home/symlnks/