If you are not using checkmarks, the error message can be disregarded. A default font will be used in its place.

OR

Install the Blackbaud font files on the workstation viewing the PDF. The font is located in the NetClassroom Font folder (the default location is C:\Program Files\Blackbaud\NC7\font) or in the FAWEB font folder (default location is C:\Program Files\Blackbaud\FAWEB7\FAWeb7\Font)