aspen求助

柠檬味的少女

   THE FOLLOWING STAGES DRIED UP (VAPOR OR LIQUID FLOW APPROACHES 0):
14 15 16 17 18 19 20 21 22 23 24 25 27 28
   A LIMIT OF  0.10000E-04 * SUM OF FEEDS WAS IMPOSED ON THE FLOW RATES
   OR A LIMIT OF  0.10000E-04 WAS IMPOSED ON THE STAGE V/L OR L/V RATIO.
塔板干涸怎么解决呀，急急急！！！