In the following table the environment variables that are specific for the ADF-GUI are listed:
| Name | Meaning | Default Value |
| SCM_ERROR_MAIL | e-mail address for error reports | no error e-mail sent |
| SCM_GUIRC | location of the preferences file | $HOME/.scm_guirc |
| SCM_TPLDIR | location of the presets directory | none |
| SCM_STRUCTURES | location of the structures directory | none |
| SCM_RESULTDIR | location of the results directory | none (current directory used) |
| DISPLAY | X-window display to use | required (for all X11 programs) except on Windows |
| SCM_MOPAC | command to start MOPAC | none (default script $ADFBIN/mopac.scm will be used) |
| SCM_QUEUES | path to the dynamic queues directory | none (ADFjobs will search the remote $HOME/.scmgui) |
| SCM_GEOMODSBYORDER | The geometry slider will always move the last group of atoms | none (the smallest group will move) |
| SCM_FFMPEG | The ffmpeg program to use to generate movies | none (the PATH will be searched) |
| SCM_PACKMOL | The packmol program to used by the Builder | none (the PATH will be searched) |
