Ratpack...reading what you said
"My bike is a 2009 RK, 9000km, break fluid level is ok, the system was never opened, ABS update was installed, and there are no leaks, service was made at 8500km."
Problem is definitely a warranty issue...and one the dealer should be quick to fix...as ABS system and bleeding brakes is a dealer diagnostic/safety issue to be sure! They may also have additonal codes, service bulletins and details in the service they did, to be sure it all checks out as well.