Using LYAP function from Control Toolbox on Supercomputer Software

Good evening.

I am using some code that involves a call to the control toolbox function lyap. This function is of course defined for inputs of type double.

However, when I use the function on a server which supports the Louisiana Optical Network Intiative, LONI supercomputer, I get the error:

??? Undefined function or method 'lyap' for input arguments of type 'double'.

In the gui that is on the server I can type "help lyap" and it gives the description of the function which solves the continuous time lyapunov equation. Thus, the control toolbox is installed on the server (At least I assume this is what I can infer).

However I still get the above error.

Thank you for your help.

 -J. Walters