When the program starts or I open a new document, I get the message "Failed to create empty document".

There is not enough memory on your machine to create an empty document. To make more memory available, you can: close any other Elevate documents and other applications that are running. If the problem persists, then there is a shortage of “virtual memory” – most people leave Windows to choose the amount of virtual memory available – freeing hard disk space will normally solve the problem. If this does not work, please consult your system administrator or Peters Research technical support.