There was an attempt to perform an action on a zero-sized window

Hi rraghvani,

I have tried all the workarounds suggested by you and by everyone else, unfortunately nothing is working. I would talk to the developer (he is away right now), lets see what he has to say.

Thank you so much for all the help everyone!!

Could you try the following test, create a new function, copy and paste the FullName

and then only perform either Click() OR Click(-1, -1) to see how the control behaves -

void test()
{
  // Past FullName
  var btn = Sys["Process"]("AXISEL")["WinFormsObject"]...("TV")["OutlineItem"]("TestComplete Work Area 1 Collapsed")
  btn.Click()
  // OR
  btn.Click(-1, -1)
}

Also, the item shown in the Object Browser is shown as "TestComplete Work Area 1 Collapsed" whereas the UI shows "TestComplete Work Area 1" without the word "Collapsed"? Could you also try using a wildcard e.g. 

// Use wild card
...("TV")["OutlineItem"]("TestComplete Work Area 1*")

And then run test() again.

Also, try to enable the various Playback settings, and run the test() to see if it makes any difference.

Finally, if the UI control is a custom control, then you need to speak with the developers and find out how to go about interacting with the control.

I'm trying to diagnose the issue first, as opposed to providing a workaround! I believe your control is most likely a custom control, as the screenshots you have provided don't tie up, with what is shown in TC, which is typical of a custom control.

As I suggested, it's best to speak with the developers and find out how to go about interacting with the control 👍🏻