FGLGUI is 1 by default

The default mode differs between Four Js BDS and Genero BDL.

With Four Js Business Development Suite (BDS), when the FGLGUI environment variable is not set, the application starts in TUI mode (FGLGUI=0).

With Genero Business Development Language (BDL), when the FGLGUI environment variable is not set, the application starts in GUI mode (FGLGUI=1).

Therefore, when migrating from Four Js BDS, it is recommended that you set FGLGUI=0 to run the application in text mode as a first step.