coverage report command error info

I wrote a script to run simulink model and generate the coverage report into .html files (name as: TC1.html, TC2.html, TC3.html...). This script works fine in my laptop.

Because I want to run a lot of experiment, I move related models in HPC and run the script again. This time I got an error message:

Error in Expr_cr (line 41)

    cvhtml(sprintf('TC%i',i),cvdo);

The complete code section is:

for i =1:20

    in = Inputs(i,:);
    cvto = cvtest('model_a');
    cvdo = cvsim(cvto);
    cvhtml(sprintf('TC%i',i),cvdo);

end

Actually the line of cvhtml... is only to generate the html file and name them in sequence: like TC1, TC2, TC3....TC20.

Any suggestino about this error message?

thanks in advance.

[Troy Vie]

By the way, the script should generate 20 .html files and then finished. Now just generate TC1.html and stopped.