I'm trying to execute this callback example from http://cc.

I'm trying to execute this callback example from http://cc.embarcadero.com/item/28288 and it give's me an error when i try to send a notify callback to other client. The Broacast message still ok.
Someone knows how to correct this problem?

Error:
Remote error: VAR and OUT arguments must match parameter type exactly.

Note: Used Delphi Berlin
http://cc.embarcadero.com/item/28288