logistic回归Warnings解决求助，急！！！！

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做logistic回归，出现以下warnings，跪求各位高人帮忙解决

Warnings
Estimation failed due to numerical problem. Possible reasons are: (1) at least one of the convergence criteria LCON, BCON is zero or too small, or (2) the value of EPS is too small (if not specified, the default value that is used may be too small for this data set).

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关键词：logistic回归 warnings logistic warning logisti specified default criteria problem failed

有人遇到过不？希望能帮我回答一下，感激不尽

去掉一些缺失值较多的变量试试，观测值少