HELLO THERE ; THE PROJECT I'M WORKING ON AT THE CURRENT HAS ONE WAY CURTAIN, I DID NOT MAKE A CASSETTE FLOORING, BECAUSE I CAN'T MAKE FLOOR FLOORING AND I RECEIVED THE R COEFFICIENT OF THE SYSTEM IN THE X DIRECTION 8 , 7 IN THE Y DIRECTION. I CHOOSE DUCTILITY LEVEL HIGH. TO ME, THE SYSTEM GIVES THE ATTACHED ERRORS, SAYING IT IS A11 BUT PROGRAM A14. -Did I MAKE A WRONG DESCRIPTION OF THE CASSETTE FLOOR? CAN WE ACCEPT DUCTILITY LEVEL HIGH WHEN WE MAKE CASSETTE FLOORING IN THE SYSTEM? THANKS..