画完路径图后，运行时出现以下提示：
An error occurred while attempting to fit the model.
The sample moment matrix is not positive definite. It could fail to be positive definite for any of the following reasons:
1. The sample covariance matrix or the sample correlation matrix contains a date entry error.
2. The observed variables are linearly dependent (perhaps because the sample size is too small).
3. The sample covariance matrix or sample correlation matrix was computed form incomplete data using the method of
“pairwise deletion”.
4. The sample correlation matrix contains correlation coefficients other than product moment correlations (such as tetrachoric correlations).
For maximum likelihood estimation only, it maybe appropriate to check “allow non-positive definite sample covariance matrices” in the “Analysis Properties” window, or to use the non-positive method.
请问这是怎么回事啊？拜求高人指点。先谢过了啦！路径图及数据附上！