Sudden error in fplot?

I am trying to use fplot (which I have been using for a long time), but now when I try to graph this in a script file called 'test':

syms x
fplot(sin(x))

it gives me this error:

Index exceeds matrix dimensions.

Error in fplot (line 56)
lims = args{2};

Error in test (line 2)
fplot(sin(x))

I can't figure out what's wrong. It used to work perfectly before but I'm not sure why this isn't working. Could someone explain to me what is going on?

Answer 1

[Walter Roberson]

You are using an older version of MATLAB, in which fplot required two arguments. After a few releases, a default was used for the second argument, but not at the beginning.

Is it possible that you recently started using an older version of MATLAB than you had been using?