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Close any open VIs and open the
Edit MeVI, located in theC:\Exercises\LabVIEW Basics Idirectory. The following front panel is already built.The VI is already running when it opens. While the VI runs, you cannot use the menu bar, toolbar, or keyboard shortcuts to edit or abort the VI.Figure 1 
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Click the
Startbutton. After 10 seconds, the VI stops running and quits LabVIEW. - Relaunch LabVIEW and open a blank VI.
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If the VI you want to edit either does not have subVIs
or you do not know what it contains, complete Item 5 through Item 13.
However, if the VI you want to edit has subVIs, open one
of the subVIs and modify the block diagram to break the
subVI. For example, place an
Addfunction on the block diagram and do not wire the inputs. Open the VI you want to edit. Because its subVI is nonexecutable, the VI that calls it is also nonexecutable. It opens in edit mode and theRunbutton appears broken. Make sure to fix the subVI after you edit the calling VI. - Display the block diagram of the new VI.
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Place the
Edit MeVI, which is already built, on the block diagram. The front panel for theEdit MeVI displays. Although you can display the block diagram of theEdit MeVI, you cannot edit it. -
Select
Operate>>Change to Edit Mode. A dialog box informs you that the VI is locked. -
Click the
Unlockbutton. You now can edit the VI. You also can unlock a VI by selectingFile>>VI Propertiesand selectingSecurityfrom theCategorypull-down menu. -
Select and delete the
Quit LabVIEWfunction from the block diagram. -
Save and close the
Edit MeVI. Close the new VI and do not save changes. -
Open the
Edit MeVI again. - After the VI runs, try to edit it.
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Close the
Edit MeVI.









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