初学sem，处理问卷数据，问卷数据来源不太可靠，于是运行lisrel时出现以下几个提示：
 1.W_A_R_N_I_N_G: PHI is not positive definite

 2.W_A_R_N_I_N_G: THETA-DELTA is not positive definite
 
3. W_A_R_N_I_N_G: 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
而且加了pd命令，路径图仍出不来，求教各位 大虾指点，这三个报警提示是什么意思，谢谢！

[此贴子已经被作者于2009-1-7 16:15:07编辑过]