The SAPLPD program has to keep running on the computer on which novaPDF runs on. Once started, if it works correctly it will display a status window ending with a 'SAPLD Version 6.28 for Windows/NT (OPT) is listening' (the version will vary depending on the SAP version).
Just to be on the safe side that it's installed correctly, you can print a test page to novaPDF from a remote computer in the same network. It's important to set the correct Permissions, because SAP R/3 needs to have access to the novaPDF (a detailed guide on how to install novaPDF and share it is available here - How to install and use novaPDF as a shared network pdf printer). Install novaPDF on a computer (the printer server), and make sure that the printer is set to be shared and that it allows access to it (in the Security tab, the Everyone group should have Permissions to Print, Manager Printers and Manage Documents).
To use novaPDF with SAP R/3 release 4.0B, follow these steps:
