VB error "Type mismatch"

Hi Guys, I am getting type Mismatch in the last line below for this VB Code. Any ideas why?

Dim wb As Workbook
Set wb = ThisWorkbook


    Workbooks.Open filename:= _
        "O:\PRODUCT CONTROL\London P&L\GM_London_PnL_20160912.xlsm"
    Range("D83:D84").Select
    Selection.Copy

    Windows(wb).Select
JustinFinancial ControlAsked:
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Rgonzo1971Commented:
Hi,

pls try

wb.Activate

Regards

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JustinFinancial ControlAuthor Commented:
excellent
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Visual Basic Classic

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