Reluctantly, UTCS has started using hard quotas on home directories. You can read more about it here.
Not being able to save things to disk, or experiencing editor save failures are signs that your home directory may have reached quota. Use chkquota to see if you have reached yours. You can use du -sk ~/* ~/.??* | sort -n to see what is taking up the most space. Try removing some files to see if that fixes your issues. If the problem is still occurring, send mail to firstname.lastname@example.org describing the problem. We are NOT ABLE to raise your quota.