From: utzoo!david
Newsgroups: advising
Title: zero field width message 
Article-I.D.: utzoo.2522
Posted: Wed Oct 13 10:04:17 1982
Received: Wed Oct 13 10:04:17 1982

On occasion files including tables generate the message
"zero field width" when formatted.  The problem is caused
by a table with a column in which the only actual entry
is spanned to another column.  Tbl calculates a width
of zero for the column and passes this on to nroff which
complains.  The immediate solution is to put something in
the column such as a space, or to give the column width
explicitly.