As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONDUCTED ABORTED TAKEOFF AT APPROXIMATELY 80-90 KIAS DUE TO EICAS MESSAGE "ENG 1 REV DISAGREE". COMPLIED WITH ABORT PROCEDURE. MESSAGE DISAPPEARED DURING DECELERATION. COULD NOT DUPLICATE THE EICAS "ENG 1 REV DISAGREE" MESSAGE. RETURNED TO THE GATE FOR FURTHER INVESTIGATION. INFORMED FLIGHT FOLLOWING AND CHIEF PILOT OF THE SITUATION. DISEMBARKED THE PASSENGERS INTO THE SJC TERMINAL WHILE A MAINTENANCE PROCEDURE WAS PERFORMED. MEL 78-34-00 COMPLETED FOR "ENG 1 REV DISAGREE" MESSAGE AT 1730 LOCAL. UNEVENTFUL DEPARTURE SJC-MHR AT APPROXIMATELY 1758 LOCAL WITH 32 PASSENGERS.