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