(.stkundflw)((**Stack Underflow - attempt to retrieve argument from empty stack.) = (stack contains:) = /pstk  .stop ) .cvx .def
(.undefkey)((**Undefined symbol: ).print = (stack contains:) = /pstk .stop ) .cvx .def
(.badname)
((**Bad File Name -- no file with this name could be found.) = (stack contains:) = /pstk  .stop).cvx .def
(.typechk)
((**Type Error -- bad arguments on stack --) = (stack contains:) = /pstk .stop ).cvx .def
(.dictfull)
(( **Dictionary Full --an attempt to define entry into full dictionary.) = (stack contains:) = /pstk  .stop).cvx .def
(.syntaxerr)
((**Syntax Error-- an isolated right paren has been found by the scanner.) = (stack contains:) = /pstk  .stop).cvx .def
(.overflow)
((**Numeric Overflow-- numeric overflow has occurred in scanning a number.) = (stack contains:) = /pstk  .stop).cvx .def
(.stkovrflw)
((**Stack Overflow-- This error may come from various parts of the JaM machine. When error occurs, all stacks are stored into arrays and put on operand stack in the order: opstack, dictstack, execstk.) = (stack contains:) = /pstk .stop).cvx .def
(.rangechk)
((**Range Error -- some operation is attempting to index out of bounds.) = (stack contains:) = /pstk  .stop).cvx .def

(/execstk)
((execution stack contains:) = .execstk .dup .length 2 .sub -1 0 (2 .copy .aget == .pop).cvx .for .pop ).cvx .def