If you want to use ACUCOBOL-GT in the traditional MPE/iX environment (outside of POSIX), you should set the following MPE/iX environment variables.
:SETVAR HPPATH HPPATH+",.,/ACUCOBOL/bin" :SETVAR A_TERM "hp" :SETVAR A_TERMCAP "/ACUCOBOL/etc/a_termcap"