MATLAB: Do I get the error “Invalid setting in ‘/‘ for parameter ‘‘.” when calling set_param

Question

Why do I get the error "Invalid setting in '<model>/<block>' for parameter '<param>'." when calling set_param using the following line of code?

set_param('my_model/Constant', 'Value', 0);

Answer 1

When using set_param for the "Value" field of a Constant block, use a character array instead of a double, which is evaluated to the actual value.

This is true of many parameters on other blocks as well.

This is fixed by making the following modification:

set_param('my_model/Constant', 'Value', '0');

Note that the 0 is enclosed in single quotes, making it a character array.