How i can get rid of this error?

I have downloaded a file from following fex link

https://www.mathworks.com/matlabcentral/fileexchange/61097-sampling-and-reconstruction-of-analog-signal

But when i try to run it in my matlab and enter user input value and press the run simulation button i get error shown in attached photo

Answer 1

[ABTJ]

In m-file, % Settings for Spectrum Scope, replace old value by these one

span = 9*F;

span1 = 9*F;