Question

This question has been edited due to lengthy comments and updates from proposed answers.

As requested here is module 13;

Sub SaveInFormat()
Application.DisplayAlerts = False
Workbooks.Application.ActiveWorkbook.SaveAs Filename:="C:\Documents and Settings\jammil\Desktop\AutoFinance\ProjectControl\Data\" & Format(Date, "yyyymm") & "DB" & ".xlsx",   leFormat:=51
Application.DisplayAlerts = True
End Sub

Also there are issues with the errorhandling, I know I’ve gone wrong with it but I’m more interested in fixing the close function at the moment before I get into it. Here is the error handling code that needs some work

Sub test()

Dim wk As String, yr As String, fname As String, fpath As String
Dim owb As Workbook

wk = ComboBox1.Value
yr = ComboBox2.Value
fname = yr & "W" & wk
fpath = "C:\Documents and Settings\jammil\Desktop\AutoFinance\ProjectControl\Data"
owb = Application.Workbooks.Open(fpath & "\" & fname)
On Error GoTo ErrorHandler:
ErrorHandler:
If MsgBox("This File Does Not Exist!", vbRetryCancel) = vbCancel Then Exit Sub Else Call Clear

'Do Some Stuff

Call Module13.SaveInFormat

owb.Close

this is your test code plus my changing of the file path and name

Answer 1

After discussion posting updated answer:

Option Explicit
Sub test()

    Dim wk As String, yr As String
    Dim fname As String, fpath As String
    Dim owb As Workbook

    With Application
        .DisplayAlerts = False
        .ScreenUpdating = False
        .EnableEvents = False
    End With

    wk = ComboBox1.Value
    yr = ComboBox2.Value
    fname = yr & "W" & wk
    fpath = "C:\Documents and Settings\jammil\Desktop\AutoFinance\ProjectControl\Data"

    On Error GoTo ErrorHandler
    Set owb = Application.Workbooks.Open(fpath & "\" & fname)

    'Do Some Stuff

    With owb
        .SaveAs fpath & Format(Date, "yyyymm") & "DB" & ".xlsx", 51
        .Close
    End With

    With Application
        .DisplayAlerts = True
        .ScreenUpdating = True
        .EnableEvents = True
    End With

Exit Sub
ErrorHandler: If MsgBox("This File Does Not Exist!", vbRetryCancel) = vbCancel Then

Else: Call Clear

End Sub

Error Handling:

You could try something like this to catch a specific error:

    On Error Resume Next
    Set owb = Application.Workbooks.Open(fpath & "\" & fname)
    If Err.Number = 1004 Then
    GoTo FileNotFound
    Else
    End If

    ...
    Exit Sub
    FileNotFound: If MsgBox("This File Does Not Exist!", vbRetryCancel) = vbCancel Then

    Else: Call Clear