Mike 11 之"Invalid floating point operation"错误

发布于新浪博客，时间：2009-06-18 21:45:37 分类: 水利模型、信息化 原文 (opens new window)

这个错误非常普通，但其原因很难判断，大多数是因为模型具有很大的不稳定因素，比如模型中存在一些非规则的输入等等。此时建议用人为为给定初始场或者加载热启动场，或者以稳态or准稳态流模式运行模型，在此模式下，软件会提示出很多导致模型不稳定的问题，参考信息提示一一修改。

对单一HD的运算，注意河网的连接关系是否正确，特别是三叉口。断面的Mark点，X、Z值是否为非数值型、是否每个断面都计算了水力参数等。如果有结构物，检查结构的设置是否有逻辑型错误等等。

很多初学者可能都关注这个问题，可能我写的不够清楚，以下是DHI客服的回复，以供参考：

【Julie Landrein】

The error "invalid floating point operation" is very general so it is difficult to estimate what the exact problem is. The error message often results from a large instability in the model or from some illegal operation done by the model e.g. divided by zero.

Maybe you could try to use Parameter File as initial conditions or a Hotstart file.  If you would like to use Steady State, then I recommend that you check the stability of the model. If you can't solve the problem, then I suggest that you send us a copy of your modeling files so that we could investigate the error further.