I've had a problem pop up out of the blue.  At my company, we use a particular drawing template where the title block is filled out automatically by linking to custom properties in the part files placed in the drawing.  One field in the title block, the "Checked By" field, doesn't get populated because there is no corresponding custom property in the part files, although that field does have a link to a custom property.  In other words, the field is looking for property "Checked By" from the part.  The part template doesn't have a property "Checked By", so the field on the drawing shows nothing.  Normally.  Suddenly, in the last day, that normally blank field starts getting filled in with "ERROR! Checked By".  It shows that in new drawings and drawings I did years ago.  This happens on my computer, and only my computer, which tells me it's not the templates and it's not the drawings.  It's some system setting that got changed somehow.  Any ideas on what I have to change?