No parameters

Unknown command

No PICT available

Too many boxes

Command not allowed in header or footer

Box or column modes cannot be nested

Bad column spacing or size

Too many tabs

Stack overflow

Command too long

Runaway set of commands

Header or footer is too long

Typesetting ended while in a box mode

Cannot load PICT

Cannot set rectangle relative to line in footer

Illegal command in current mode

Bad rectangle

Bad Quickdraw command

Out of memory

File error

Cannot set that margin

Bad argument