I have recently begun playing two games of legendary AD&D-Goldbox Series. I cannot load or save a Game. Whenever I try I am getting the following message:

unexpected error during save: 3

It happened in both Buck Rogers-Games, Countdown to Doomsday and Matrix Cubed.
A path for the savegames has been set in the .cfg file. If there is anyone out there still playing those Oldie-Games, I would be glad for help.
Tanks in advance.

P.S. Sorry for my bad english. It is not my native language.