Runtime errors occur when the software does something unexpected.
If a Runtime error occurs in any part of the program it means something abnormal has occurred. The program may continue to function or it may shutdown. If it shuts down restart the program and see if the same error occurs.
If the error persists you will need to e-mail admin@pjdata.com.au to resolve the problem. Take a screen shot of what the error is and send this with an explanation. We normally respond quickly to errors.