Sorry to hear that; I didn't know.
Agree it's better to test if you have the data needed before entmake* functions.
If you're wanting to get CAD back, consider joining AUGI as Pro members get a free ADN (Autodesk Developer Network) membership, which would give you any Autodesk product to use for development.
https://www.augi.com/adn-membership-offer
Cheers