OpenBrowser activity fails to open IE in REF


I am using the “Open Browser” activity to open an IE window and then navigate to “”.

This piece works perfectly if I start a New Project and choose “Process”, but fails if I use “Robotic Enterprise Framework”.

Exact failure point:

  1. IE browser opens
  2. Navigation to “” fails and throws exception (below)

RemoteException wrapping UiPath.Core.BrowserOperationException: Cannot communicate with Internet Explorer browser. —> RemoteException wrapping System.Runtime.InteropServices.COMException: Cannot communicate with Internet Explorer browser.
at UiPath.UiBrowserClass.Open(String bstrURL,
UiBrowserFlags flag)
at UiPath.Core.Browser.Open(String url,
Boolean privateSession,
Boolean headlessSession,
Boolean defaultSession)
— End of inner exception stack trace —
at UiPath.Core.Activities.ScopeActivity.EndExecute(NativeActivityContext context,
IAsyncResult result)
at UiPath.Core.Activities.AsyncNativeActivity.BookmarkResumptionCallback(NativeActivityContext context,
Bookmark bookmark,
Object value)
at System.Activities.Runtime.BookmarkCallbackWrapper.Invoke(NativeActivityContext context,
Bookmark bookmark,
Object value)
at System.Activities.Runtime.BookmarkWorkItem.Execute(ActivityExecutor executor,
BookmarkManager bookmarkManager)

UiPath version: 2019.9.2 Community Edition
IE Version: 11.740.17763.0; Update version: (KB4522007)
Windows version: 10

Already tried:

  1. Add URL to “Trusted Sites” list
  2. “InPrivate”
  3. regsvr32 C:\Windows\System32\oleacc.dll
  4. regsvr32 C:\Windows\System32\oleaut32.dll
  5. regsvr32 C:\Windows\SysWOW64\oleacc.dll
  6. regsvr32 C:\Windows\SysWOW64\oleaut32.dll
  7. “Start with …” combinations

Thank you.

I was able to fix this.

Update the following dependencies to the latest version:

Hey @sumitd. Thanks for following up!



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