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

W_A_R_N_I_N_G: PSI is not positive definite
W_A_R_N_I_N_G: THETA-EPS is not positive definite
W_A_R_N_I_N_G: THETA-DELTA is not positive definite

大家帮忙看看这段是什么意思，该如何修改