I am getting the below error when i run the macro in excel...
Run-time error '91': Object variable or with block variable not set
The error occurs on the line str_text = Replace(link.innerHTML, "<EM>", "")
{
Sub XMLHTTP()
Dim url As String, lastRow As Long
Dim XMLHTTP As Object, html As Object, objResultDiv As Object, objH3 As Object, link As Object
Dim start_time As Date
Dim end_time As Date
lastRow = Range("A" & Rows.Count).End(xlUp).Row
Dim cookie As String
Dim result_cookie As String
start_time = Time
Debug.Print "start_time:" & start_time
For i = 2 To lastRow
    url = "https://www.google.co.in/search?q=" & Cells(i, 1) & "&rnd=" & WorksheetFunction.RandBetween(1, 10000)
    Set XMLHTTP = CreateObject("MSXML2.serverXMLHTTP")
    XMLHTTP.Open "GET", url, False
    XMLHTTP.setRequestHeader "Content-Type", "text/xml"
    XMLHTTP.setRequestHeader "User-Agent", "Mozilla/5.0 (Windows NT 6.1; rv:25.0) Gecko/20100101 Firefox/25.0"
    XMLHTTP.send
        Set html = CreateObject("htmlfile")
    html.body.innerHTML = XMLHTTP.ResponseText
    Set objResultDiv = html.getelementbyId("rso")
    Set objH3 = objResultDiv.getelementsbyTagName("H3")(0)
    Set link = objH3.getelementsbyTagName("a")(0)
    str_text = Replace(link.innerHTML, "<EM>", "")
    str_text = Replace(str_text, "</EM>", "")
    Cells(i, 2) = str_text
    Cells(i, 3) = link.href
    DoEvents
Next
end_time = Time
Debug.Print "end_time:" & end_time
Debug.Print "done" & "Time taken : " & DateDiff("n", start_time, end_time)
MsgBox "done" & "Time taken : " & DateDiff("n", start_time, end_time)
End Sub
}
Can any one give solution for this?