dasac failure是什么情况？

ssxxbb2003

窗口报告的提示或错误，如下，都什么意思啊？
     1. temperature limited to 1.000000e+000 in 10 cells on zone 2
     2. time step reduced in 114 cells
     3. Integrating chemistry on fluid zone 2 ...
        re at Temperature =   766.08 K: Continuing...                     
       dasac failure at Temperature =  1505.20 K: Continuing...                     
       dasac failure at Temperature =   779.93 K: Continuing...                     
       dasac failure at Temperature =   672.56 K: Continuing...                     
       dasac failure at Temperature =  1555.36 K: Continuing...