VBA Macro Error used with VLOOKUP - vba

Question

I recently used code from a post by #LondonRob, which allows the format of a cell to be carried over with the containing data when using VLOOKUP.
Original question - Vlookup to copy color of a cell - Excel VBA
This is great and works for the majority of values. Unfortunately some values can't have the format carried across and I receive the error:
Run-time error "13": Data mismatch
I have taken out all empty cells and by trial and error taken out any formula errors and corrected misspellings. There are still a few cells bring this message up when trying to run the macro.
I can't see any errors in the data, and the occurrence of this error in cells appears to be almost random. The data set is also huge, so even finding all the problematic cells is proving difficult (I have located a few).
I would have commented on the thread, but I don't have the reputation at this point.
The coding used is (though in my module I took out the first 6 lines) -
Option Explicit
' By StackOverflow user LondonRob
' See https://stackoverflow.com/questions/22151426/vlookup-to-copy-color-of-a-cell-excel-vba
Public Sub formatSelectionByLookup()
' Select the range you'd like to format then
' run this macro
copyLookupFormatting Selection
End Sub
Private Sub copyLookupFormatting(destRange As Range)
' Take each cell in destRange and copy the formatting
' from the destination cell (either itself or
' the vlookup target if the cell is a vlookup)
Dim destCell As Range
Dim srcCell As Range
For Each destCell In destRange
Set srcCell = getDestCell(destCell)
copyFormatting destCell, srcCell
Next destCell
End Sub
Private Sub copyFormatting(destCell As Range, srcCell As Range)
' Copy the formatting of srcCell into destCell
' This can be extended to include, e.g. borders
destCell.Font.Color = srcCell.Font.Color
destCell.Font.Bold = srcCell.Font.Bold
destCell.Font.Size = srcCell.Font.Size
destCell.Interior.Color = srcCell.Interior.Color
End Sub
Private Function getDestCell(fromCell As Range) As Range
' If fromCell is a vlookup, return the cell
' pointed at by the vlookup. Otherwise return the
' cell itself.
Dim srcColNum As Integer
Dim srcRowNum As Integer
Dim srcRange As Range
Dim srcCol As Range
srcColNum = extractLookupColNum(fromCell)
Set srcRange = extractDestRange(fromCell)
Set srcCol = getNthColumn(srcRange, srcColNum)
srcRowNum = Application.Match(fromCell.Value, srcCol, 0)
Set getDestCell = srcRange.Cells(srcRowNum, srcColNum)
End Function
Private Function extractDestRange(fromCell As Range) As Range
' Get the destination range of a vlookup in the formulat
' of fromCell. Returns fromCell itself if no vlookup is
' detected.
Dim fromFormula As String
Dim startPos As Integer
Dim endPos As Integer
Dim destAddr As String
fromFormula = fromCell.Formula
If Left(fromFormula, 9) = "=VLOOKUP(" Then
startPos = InStr(fromFormula, ",") + 1
endPos = InStr(startPos, fromFormula, ",")
destAddr = Trim(Mid(fromFormula, startPos, endPos - startPos))
Else
destAddr = fromCell.Address
End If
Set extractDestRange = fromCell.Parent.Range(destAddr)
End Function
Private Function extractLookupColNum(fromCell As Range) As Integer
' If fromCell contains a vlookup, return the number of the
' column requested by the vlookup. Otherwise return 1
Dim fromFormula As String
Dim startPos As Integer
Dim endPos As Integer
Dim colNumber As String
fromFormula = fromCell.Formula
If Left(fromFormula, 9) = "=VLOOKUP(" Then
startPos = InStr(InStr(fromFormula, ",") + 1, fromFormula, ",") + 1
endPos = InStr(startPos, fromFormula, ",")
If endPos < startPos Then
endPos = InStr(startPos, fromFormula, ")")
End If
colNumber = Trim(Mid(fromFormula, startPos, endPos - startPos))
Else
colNumber = 1
End If
extractLookupColNum = colNumber
End Function
Private Function getNthColumn(fromRange As Range, n As Integer) As Range
' Get the Nth column from fromRange
Dim startCell As Range
Dim endCell As Range
Set startCell = fromRange(1).Offset(0, n - 1)
Set endCell = startCell.End(xlDown)
Set getNthColumn = Range(startCell, endCell)
End Function
Thanks

Answer 1

There's a lot of code there, so it's difficult to say what the exact issue might be.
Try this version:
Sub tester()
Dim c As Range
If TypeName(Selection)<>"Range" Then Exit Sub
For Each c In Selection
CopySourceFormats c
Next c
End Sub
'If the passed cell has a VLOOKUP formula,
' extract the arguments and find the source of the return value.
'Copy formatting from that cell to the cell with the formula
Sub CopySourceFormats(c As Range)
Dim arr, v, rng As Range, col As Long, f As String
Dim m, fs As Font, fd As Font, rngSrc As Range
'skip any unwanted cells
f = c.Formula
If Not f Like "=VLOOKUP(*" Then Exit Sub
If IsError(c.Value) Then Exit Sub 'no "source" cell to find
'Extract just the arguments and create an array
' (assumes no arguments contain a comma:
' would need better parsing otherwise)
f = Replace(f, "=VLOOKUP(", "")
f = Left(f, Len(f) - 1)
arr = Split(f, ",")
v = c.Parent.Evaluate(arr(0)) 'get lookup value
Set rng = Evaluate(arr(1)) 'source table (could be on another sheet)
col = CLng(arr(2)) 'column number in lookup table
'Debug.Print v, rng.Address(), col
'Try to match the value in the first column of the lookup table
m = Application.Match(v, rng.Columns(1), 0)
'Got a match? Copy formatting for the "source" cell
If Not IsError(m) Then
Set rngSrc = rng.Cells(m, col)
Set fs = rngSrc.Font
Set fd = c.Font
'copy formatting: add/subtract properties to suit...
fd.Size = fs.Size
fd.Color = fs.Color
fd.Bold = fs.Bold
c.Interior.ColorIndex = rngSrc.Interior.ColorIndex
End If
End Sub