Before you attempt to start IMD, make sure that the imd directory is included in your IDL Path. Consult the IDL manuals for instructions on how to do this.
To start IMD, at the IDL prompt type:
IDL> .run imdstart
This will load IMD and launch the main IMD program. If you exit IMD and wish to run it again during the same IDL session, at the IDL prompt type:
IMD> imd
Note: You can define NORUN=1 before executing '.run imdstart', to inhibit automatic execution of the imd procedure.
Note: On Unix platforms, the IDL_DEVICE environment variable must be set to 'X'.