I am just starting to learn about reactors and the issues they can cause. I have been looking for a reactor the if the AutoCad copy command is used on an object (using vlr-object-reactor) then a flag is raised and the process is stopped. I have a special block creation routine, but I feel it is to lengthy for the call back function. Has anyone tried to create an object reactor that has a similar function? I do not want to just start trial and error since the effects on AutoCad are possibly damaging.