0083: Unknown model ID

The compiler is unable to resolve the model id using the .ide files configured for the current edit mode.

It may happen in a header-less script (e.g. a CLEO script or any script compiled with the {$EXTERNAL} directive) where all models must be compiled with their in-game id.

Possible solutions: use a model id instead of the name. To find the id use the Sanny's built-in conversion tool (Ctrl+Alt+H):

0107: $o = create_object #KEYCARD at 0 0 0 // error, can't find KEYCARD
0107: $o = create_object 1581 at 0 0 0 // OK

If the the edit mode references .ide files from the game directory make sure this directory is set in the options.