** ERROR
BLOCK B1 IS NOT IN MASS BALANCE:
MASS INLET FLOW = 0.91174798E+00, MASS OUTLET FLOW = 0.92243052E+00
RELATIVE DIFFERENCE = 0.11716546E-01
MAY BE DUE TO A TEAR STREAM OR A STREAM FLOW MAY HAVE
BEEN CHANGED BY A FORTRAN, TRANSFER, OR BALANCE BLOCK
AFTER THE BLOCK HAD BEEN EXECUTED.
各位马神,这是啥意思?