在拟合模型时，跳出这个对话框（如下），应怎么解决呢？做课题有点急呀，哪位高手支一下招吧，感激不尽~~~~---------------------------
Numeric warning
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IGLS/RIGLS NUMERIC WARNING.

SSP matrix for fixed part has gone negative definite - a reconstruction to the nearest non-negative form has been used.Numeric warnings can be suppressed by setting an option on the Estimation Control,IGLS/RIGLS panel.A discussion on the possible causes of numeric problems can be found under the upic Numeric Problems in the help system.

CONTINUE ESTIMATION ?
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是(Y)   否(N)   
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