This function is used to temporarily disable the error trapping mechanism used by :Trap and ⎕TRAP. This can be useful in debugging applications.

Y is an integer 0, 1 or 2 as shown in the following table.

R is the previous value (0, 1, or 2) of the trap state.

Y	Effect
0	Enable all traps.
1	Disable all traps.
2	Disable traps in suspended functions from triggering when an error is generated in the Session.

Note that the Disable traps in session option of the Session Options menu performs the same tasks as (600⌶0) and (600⌶2).

For error-guards in dfns 600⌶0 and 600⌶2 are equivalent; in neither case is an error generated in the session caught by an error guard in a suspended dfn.