Error: To retrieve data from this file, first open a plan, then use the File Collaborate menu option to integrate data from this file into an existing plan

This error message is reported by a third party product and not our Viewer.

To open the PDC file using Lizard Safeguard PDF Viewer, right-click on the PDC file and select ‘Open with Lizard Safeguard PDF Viewer‘.

If this does not work, make sure you have installed the Viewer correctly and that your Windows Operating System is up to date with the latest Windows service packs and updates.