Here’s an alternative snippet for how to iterate through a collection of files. Lets say we want to look at every workbook in the current directory, except the currently open one, and show each sheet name we encounter. 
Here’s how

Public Sub fileLoop()
    Dim sPath As String, ws As Variant
    ' this will loop though every file in same directory as current book
    ' except the current one
    sPath = ThisWorkbook.Path
    Dim fs As Variant, f As Variant, f1 As Variant, fc As Variant
    Set fs = CreateObject("Scripting.FileSystemObject")
    Set f = fs.GetFolder(sPath)
    Set fc = f.Files

    For Each f1 In fc
        If f1 <> ThisWorkbook.FullName Then
            With Workbooks.Open(Filename:=f1, ReadOnly:=True)
                ' do something .. show all the sheetnames
                For Each ws In .Sheets
                Next ws
                .Close False
            End With
        End If
    Next f1
End Sub

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