cassandra% make screen
## working directory is /mit/athenadoc/doc/unix/usd/28.tbl #####################
tbl tbl.ms | eqn | nroff -ms   > tbl.text
Error in example ab: referred to page 10, is on page 14
Error in example aa: referred to page 11, is on page 15
Floating Exception.
Floating Exception.
Floating Exception.
Floating Exception.
Floating Exception.
Floating Exception.
Floating Exception.
Floating Exception.
^C
*** Exit 130

Stop.