Invalid Expression error recieved when attempting to use basic built-in function, input

I have a student that is having issue when attempting to use the built-in function, input.

The functions has been used several times before, so it is unclear what the issue could be since it is a built-in function.

I"m used to seeing this error for user-define functions or expressions where there is some type of syntax error, but not for built-in functions.

Below is a screenshot of his errors using the correct implementation for the function calls.

Any help you can provide is appreciated.

[DGM]

What is the result of running this in the console?

which input -all

The top result should be the MATLAB builtin. If there's a user-created file called input.m, then it needs to be renamed or moved off the path.

[John Thomas]

That was it. Thanks.

He did happen to have a user-defined 'input.m' file.