Checking for #N/A in Excel cell from VBA code

I'm iterating through a range of cells which hold numbers with 2 decimal places. I need to check if the cell开发者_StackOverflow社区 holds '#N/A', and if it does, I need to skip it. The problem is, when a cell holds a valid number, my if condition below throws a 'Type mismatch error'. How can I avoid this?

If (ActiveWorkbook.Sheets("Publish").Range("G4").offset(offsetCount, 0).Value <> CVErr(xlErrNA)) Then
'do something
End If

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First check for an error (N/A value) and then try the comparisation against cvErr(). You are comparing two different things, a value and an error. This may work, but not always. Simply casting the expression to an error may result in similar problems because it is not a real error only the value of an error which depends on the expression.

If IsError(ActiveWorkbook.Sheets("Publish").Range("G4").offset(offsetCount, 0).Value) Then
  If (ActiveWorkbook.Sheets("Publish").Range("G4").offset(offsetCount, 0).Value <> CVErr(xlErrNA)) Then
    'do something
  End If
End If