Error Message: Failed to set Calendar date or time.

This error is displayed if you are running a 64-bit Operating System with an old version of the Writer software, and you have right-clicked on a PDF file to protect it.

Support for 64-bit was added for Safeguard Writer versions 2.6.53 and above and Enterprise versions 2.7.62 and above.

For old Writers you can however protect files from the Windows Start menu > LockLizard > Lizard Safeguard > PDF Writer > Protect Documents menu.