I'm missing something basic and can't quite come up with it.

I created a project with the following program set as main

       ... some preliminary SETS

oData = NEWOBJECT("app_data_env","progs\data_env.prg")
SET DATASESSION TO oData.datasessionid
oDataClass = NEWOBJECT("dataclass","libs\spotlightclasses")

_vfp.Caption = "Build Hardware Tray"
_SCREEN.WindowState = 2

DO FORMS forms\frmtouchbuildtray WITH oData,oDataClass
READ EVENTS

MESSAGEBOX("Main Form Done")

QUIT

The form starts up correctly and executes correctly.
There is a command button (cmdExit) with the following

CLEAR EVENTS
thisform.Release

The QueryUnload event has

thisform.cmdExit.Click()

When I click on cmdExit the form disappears but the main VFP window stays active. I don't get the "Main Form Done" messagebox and trying to close the main VFP window gets the "Cannot Quit VFP" message.

What have I missed????

Thanks to all............Rich