Issues with Working and Activating Multiple Workbooks excel VBA - excel

Question

I'm having some issues when working with calling and working with multiple workbooks. I have a macro that updates some excel sheets using some data. All 5 of those spreadsheets are assigned a variable with the filename and the file path. When I run a second SUB / Macri to Save and Close all 5 of those workbooks after they are done updating - It doesn't select the right workbooks even though they've been assigned the same variable names as the previous macro. So I believe my issue is - If the workbooks are already open I can't associate a variable too them. - I assume that if the file name and file path are right, the workbooks open can be set as variables and then be able to close them - Thoughts?
Sub CloseWorkbooks()
Dim MB, WB1, WB2, WB3, WB4, WB5 As Workbook
Dim FP1, FN1, FN2, FN3, FN4, FN5 As String
FP1 = "G:\DATA......"
FN5 = "Book1.xlsx"
FN2 = "Book2.xlsx"
FN3 = "Book3.xlsx"
FN4 = "Book4.xlsx"
FN1 = "Book5.xlsx"
Application.DisplayAlerts = False
Set WB1 = Workbooks.Open(Filename:=FP1 & FN1)
WB1.Activate
WB1.Save
'Application.Wait (Now + TimeValue("00:00:05"))
WB1.Close
Set WB2 = Workbooks.Open(Filename:=FP1 & FN2)
WB2.Activate
WB2.Save
'Application.Wait (Now + TimeValue("00:00:05"))
WB2.Close
Set WB3 = Workbooks.Open(Filename:=FP1 & FN3)
WB3.Activate
WB3.Save
Application.Wait (Now + TimeValue("00:00:02"))
WB3.Close
Set WB4 = Workbooks.Open(Filename:=FP1 & FN4)
WB4.Activate
WB4.Save
Application.Wait (Now + TimeValue("00:00:02"))
WB4.Close
Set WB5 = Workbooks.Open(Filename:=FP1 & FN5)
WB5.Activate
WB5.Save
Application.Wait (Now + TimeValue("00:00:02"))
WB5.Close
End Sub
This works if the worksheets are NOT Open, but it doesn't work if the worksheets are open - which is what I want it to accomplish. The previous macro opens all the worksheets and updates them. I want this macro (2nd one shown above) to save and close all the workbooks.
-Thank you.

Answer 1

If you replace your Workbooks.Open(...) with a call to this it should return the workbook if its open, and open and return it if it is not.
Public Function getWorkbookByFileName(ByVal FileName As String) As Workbook
Dim Book As Workbook: Set Book = Nothing
Dim Count As Integer: Count = Application.Workbooks.Count
Dim Index As Integer: Index = 1
Do
If Application.Workbooks(Index).FullName = FileName Then
Set Book = Application.Workbooks(Index)
Exit Do
End If
If Index < Count Then
Index = Index + 1
Else
Exit Do
End If
Loop
If Book Is Nothing Then
Set Book = Application.Workbooks.Open(FileName:=FileName)
End If
Set getWorkbookByFileName = Book
End Function
This is fairly long winded, looking at some of the answers to Detect whether Excel workbook is already open I see that it can be achieved without looping through the workbooks.

Answer 2

This will close the correct workbook.
Sub CloseWorkbooks()
Application.DisplayAlerts = False
Dim wb As Workbook
Dim i As Long
For i = 1 To 6
Set wb = Workbooks.Open(Filename:="G:\DATA......Book" & i & ".xlsx")
Application.Wait (Now + TimeValue("00:00:02"))
wb.Close SaveChanges:=True
Next i
Exit Sub