SET-INHIBIT-WARNINGS!

control warnings non-locally
Major Section:  SWITCHES-PARAMETERS-AND-MODES

Please see set-inhibit-warnings, which is the same as set-inhibit-warnings! except that the latter is not local to the encapsulate or the book in which it occurs. Probably set-inhibit-warnings is to be preferred unless you have a good reason for wanting to export the effect of this event outside the enclosing encapsulate or book.