浓度分布计算出错，求助

hotczx

There is zero MASS FLUX everywhere in the model based on the default criterion. please check the value of the average MASS FLUX during the current iteration to verify that the MASS FLUX is small enough to be treated as zero. if not, please use the solution controls to reset the criterion for zero MASS FLUX.
这是在提交job时出现的，是什么原因呢，我计算的是稳态下的浓度扩散.