/**
 * Indicates there was a System error (cpu/memory error) 
 * during execution
 */
public class SystemException extends Exception {

	private String message = "Stack Machine Exception";

	/*  Constructors */
	public SystemException() {}
	public SystemException(String msg) 
		{ message = msg; }

	/* Error Retrieval */
	public String toString() 
		{ return message; }
}