Please could you help me understand where the problem is in the model specification. I don't know how to read which one is parameter 155. I sometimes got similar errors but in different parmeters. Many thanks.
THE STANDARD ERRORS OF THE MODEL PARAMETER ESTIMATES MAY NOT BE TRUSTWORTHY FOR SOME PARAMETERS DUE TO A NON-POSITIVE DEFINITE FIRST-ORDER DERIVATIVE PRODUCT MATRIX. THIS MAY BE DUE TO THE STARTING VALUES BUT MAY ALSO BE AN INDICATION OF MODEL NONIDENTIFICATION. THE CONDITION NUMBER IS -0.222D-18. PROBLEM INVOLVING PARAMETER 155.