VBA - losing control of internet exploror - ms-access

Question

I have a function that loads a website prompting a user to login. This works on everyone's computers except one person and I cannot figure it out. I get a runtime error on the line Do Until ieApp.ReadyState = 4: DoEvents: Loop that reads "Automation error. The object invoked has disconnected from its clients."
Function Firewall_Login() As Boolean
Dim ieApp As Object
Dim ieDoc As Object
Dim ieTable As Object
Dim ieDocResult As Object
Dim start_time
Set ieApp = CreateObject("internetexplorer.application")
start_time = Now()
ieApp.Navigate "http://awebsite.com/"
Do While ieApp.ReadyState = 4: DoEvents: Loop
Do Until ieApp.ReadyState = 4: DoEvents: Loop 'errors here just on the one computer
Set ieDoc = ieApp.Document
...
'do some stuff
...
ieDoc.Close
Set ieDoc = Nothing
ieApp.Quit
Set ieApp = Nothing
Firewall_Login = True
End Function
Seems like the object ieApp simply loses the instance of IE and can't do anything. Anyone have any suggestions?
All users are on the same version of IE -- 11.0.9600.18816

Answer 1

This code is taken from my blog. The code loops through shell windows looking to match the title bar which for IE will be the url. This way the reference is reacquired. Sometimes the reference can be lost due to a change of security zone etc.
Option Explicit
'* Tools - References
'* MSHTML Microsoft HTML Object Library C:\Windows\SysWOW64\mshtml.tlb
'* SHDocVw Microsoft Internet Controls C:\Windows\SysWOW64\ieframe.dll
'* Shell32 Microsoft Shell Controls And Automation C:\Windows\SysWOW64\shell32.dll
Private Function ReacquireInternetExplorer(ByVal sMatch As String) As Object
Dim oShell As Shell32.Shell: Set oShell = New Shell32.Shell
Dim wins As Object: Set wins = oShell.Windows
Dim winLoop As Variant
For Each winLoop In oShell.Windows
If "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" = winLoop.FullName Then
Dim sFile2 As String
sFile2 = "file:///" & VBA.Replace(sMatch, "\", "/")
If StrComp(sFile2, winLoop.LocationURL, vbTextCompare) = 0 Then
Set ReacquireInternetExplorer = winLoop.Application
GoTo SingleExit
End If
End If
Next
SingleExit:
End Function