




 
*redefinition-action*
 controls messages about redefinitions seen by the source location system.
If 
*redefinition-action*
 is set to 
:warn
 then you are warned. If it is set to 
:quiet
 or 
nil
, the redefinition is done quietly.  If, however, it is set to
 :error
, then LispWorks signals an error.
These messages are triggered by defining forms provided, but they could also be from any call to record-definition.
*redefinition-action*
 is documented in the 
lispworks
 package in LispWorks 4.3 and earlier. It is still currently still available there but this may change in future releases and you should now reference it via the 
dspec
 package.
LispWorks User Guide and Reference Manual - 21 Dec 2011