沥青路面降雨入渗？

大神们，用ABAQUS进行渗流分析时，一直出现重置流通量的情况，具体语句如下：

There is zero VOL. FLUX everywhere in the model based on the default criterion. please check the value of the average VOL. FLUX during the current iteration to verify that the VOL. FLUX is small enough to be treated as zero. if not, please use the solution controls to reset the criterion for zero VOL. FLUX

这个怎么解决？？