#### Open

The File | Open menu option allows you to switch between part programs anytime by invoking the Open dialog box and allowing you to select a different part program. If the part program you select is different from the currently executing part, PC-DMIS will automatically save and close the active part program before loading the newly selected part program. If however, you try to select and initiate the active part program a second time from the Open dialog box, PC-DMIS offers two choices:

- Discard all changes made to the active part program since the last Save operation and reload the selected part program without the changes.

- Cancel the entire operation and return to the Open dialog box.

You can only have one part program open at a given time in Operator Mode.