can`t close DxDesigner /viewdraw at the end of script !

Hi,

I wanted to write a script which will exit the current runing designe. But if i run the  Quit method at the end of the scriptlines I geth this message:

any Idea ?

is this new in VX ?

my script snipped

Dim dxdapp, PrjData, PrjPath

set dxdapp = Application                                                          

dxdapp.CloseProject()              

dxdapp.Quit()                                            ' Close current xDxdesigner