Error message COMError: (-2147220991...) from menu_select

Hi there,

Thanks for providing this tool. I ran into one issue today. I am using the latest version of pywinauto on Windows 10 with one app coded on Winform.

After the following script is executed, I got the error message: COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))

Application(backend="uia").start(apptorun)
app = Application(backend="uia").connect(path = apptorun)
windowsMain = app['Main Window']
windowsMain.menu_select("Help->About")

So my question is :

1. Any idea why we have this error? It seems program is waiting for this window closed.
2. Do we have way to set timeout for menu_select?

Thanks,

[taiqixp]

Alright. I have one workaround now. Thanks for your help.

windowsMain = app['Main Window']

help = windowsMain['Help'].select()

submenu = app['Dialog'] # Dropdown submenu is a top-level window

submenu['About'].click_input() # or .click_input()`

[darkworks]

There is a chance that the COM error -2147220991 could be related to pywinauto internal caching of UIA interfaces. @basicAuto , you could try to patch temporarily your pywinauto installation and see if the problem goes away. To disable the caching you need to comment in this line in your pywinauto sources:

https://github.com/pywinauto/pywinauto/blob/5832acf8dd5a92852d3d5b328064f023b5d68e4a/pywinauto/controls/uiawrapper.py#L133

Another way to disable the caching is to remove @lazy_property decorator on UIAWrapper.iface_* methods.

not worked , tested it