Calling a function containing symbolic character

Hello ! I am trying to call a function that has syms t or in other words, I've taken it's inverse Laplace and it is in the Time domain. Now when I call the function in my main program, it gives me the following error "Input arguments must be convertible to floating-point numbers."

I am trying to give t a value by entering t=0:1 in my main program however it seems that the minimum or eval command does not understand symbolic characters. I'll appreciate the help guys :)