I have put the code below in a workbook to unshare. Here are my
steps.
1. I manually share the workbook from the Worksheet Menubar.
2. I run the code below from a command button.

Dim Filename As String
Filename = ActiveWorkbook.Name
'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
'Copy this code into the 'Shared' workbook - PART 1 of 2
'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Application.DisplayAlerts = False
If ActiveWorkbook.MultiUserEditing Then
ActiveWorkbook.UnprotectSharing
ActiveWorkbook.ExclusiveAccess
End If
Application.StatusBar = ("Please wait initialising workbook.")
Application.DisplayAlerts = True
'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
'End of Part 1
'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
For Each Sht1 In Workbooks(Filename).Worksheets
Sht1.Unprotect
Next Sht1

When I run the macro I get an error message Run-time error '1004'
Method "UnprotectSharing" of object "_Workbook" failed.

I would appreciate any assistance on this problem. Thanks. Matt