Here is my solution

				selectionObjectTemp = Sketchup.active_model.selection.to_a
				if selectionObjectTemp.length == 0 
					selectionTemp = nil
				else 
					selectionTemp = selectionObjectTemp 
				end
				
				
				
				if @definitions[definitionAImporter]
					definition = @definitions[definitionAImporter]
				else 
					composantPath = File.join(@libPath,"#{definitionAImporter}.skp")
					if File.exist?(composantPath)
						definition = @definitions.load composantPath
					else
						UI.messagebox "le chemin n'existe pas; #{composantPath}"
					end
				end
				
				if selectionTemp != nil
				selectionTemp.each{|entitie|  
					if entitie.is_a? Sketchup;;ComponentInstance 
						entitie.definition = definition 
					end
				}
					
				end 
				

@thomthom said:

@dds said:

what is the ruby command to execute the command reload or recharge (like the right mouse click).

What is the context of this question? Wondering is there is an alternative way to solve what you are looking for.

I want to create a button that changes the selected component (+ all similar) by another based on its name.

yes, it : "Reload..." when right-clicking on an instance
I'll look for workaround snippets posted in the forums.
Thanks

what is the ruby command to execute the command reload or recharge (like the right mouse click).

yes, it's minimize the window

Sketchup to close it to do: Sketchup.send_action 57665

but to reduce what is the code that should be used