出不来结构方程图 出现以下错误 望高手指点：
the model does not 。。。
还有下面这句话是什么意思呢？
The solution was found non-admissible after  50 iterations.
                The following solution is preliminary and is provided only
                for the purpose of tracing the source of the problem.
                Setting AD> 50 or AD=OFF may solve the problem