why COM Quit doesn't work - EXCEL.EXE still visible in Task Manager

ruby

example in luart is Word, which works.

but Excel not work.

after Quit(), it still visible in Task Manager

► excel = sys.COM("Excel.Application")
► excel:Quit()

even if I visualize it and close it by mouse, it still visible in Task Manager

excel.visible=true
--  close it by mouse click cross at right top corner

normally if I open Excel and then click cross at right top corner to close it , it quickly disappear from Task Manager

ruby

ok, I think I find a solution:

excel = nil
collectgarbage()

now it quickly disappear from task manager.

but Word does not need this.

only in quickrt.exe. luart.exe is ok. after exe exit everything is garbage no need to collect

Samir

Yes COM objects are destroyed once garbagecollected. You can either force the garbagecollection or make the Excel application hidden while it will be garbage collected.

ruby

I always use ctrl C to exit quickrt.

but this way COM excel never kill that excel.exe process, even after hours.

correct way is use sys.exit() to quit quickRT, then excel.exe process disappear immediately.

maybe need automatic sys.exit() when ctrl C is captured.