Artificial Neural network training

I run a program for NN training using PSO. When i run the progrm, i got an error. kindly check the error and pls tell how to correct it.\

program:

clc; close all; clear all; Tr_in=(xlsread('CNSCTTrainGLCM.xls'))'; Tr_ta=(xlsread('CNSCTTrainTarget.xls'))';

 load livnet;
Te_in=(xlsread('CNSCTTestGLCM.xls'))';
Y = sim(livnet,Te_in);
plotconfusion(Tr_ta,Y);

             where livnet is the m.file for pso parameters

the error shown is:

> In mainlever1 at 7 Warning: An error occurred when running a class's loadobj method. The object that was loaded from the MAT-file was a copy of the object before the loadobj method was run. The rest of the variables were also loaded from the MAT-file. The encountered error was: Error using ==> trainpso at 124 Unrecognized code.

*> In mainlever1 at 7 ??? Error using ==> mainlever1 at 9 'model' parameter must be a string *