You need to put the code in your message, regardless if it is works on another machine or not. We need to see the programming that you have used to help understand the problem.
When did this problem start also?
When was the last time you ran this program?
Was someone else running this machine?
Did you loose parameters on this machine?
We need to understand what led up to this event. Such as; it was running yesterday, and today when you came to work, it doesn't work any more.