파일이 열려있는지 확인하고 열려있지 않으면 여는 코드 - Heeyoung-Ahn/Excel_VBA GitHub Wiki

    Dim rawFOpen As Boolean
    Dim fileC As Workbook

    rawFOpen = False
    For Each fileC In Workbooks
        If fileC.Name = rawF Then
            rawFOpen = True
            Exit For
        End If
    Next
    If rawFOpen = True Then
        Workbooks(rawF).Activate
    Else
        Workbooks.Open Filename:=rawP & rawF
        Workbooks(rawF).Activate
    End If