B757-200
Flight Crew Air Transport Pilot (ATP)
Situational Awareness
Deviation / Discrepancy - Procedural Other / Unknown
Flight Crew Became Reoriented; Flight Crew Rejected Takeoff
Aircraft; Human Factors
When power was advanced for takeoff; configuration warning occurred; power was retarded; we cleared the runway; corrected the situation and returned for takeoff.
B757-200 pilot reported rejecting the takeoff when they received a configuration warning as power was advanced.