Wrapping an IFERROR Function Around Your Formulas

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What This VBA Code Does

This VBA macro will add an IFERROR function around any cell formula in a given selection.   I have coded the IFERROR function to return a blank value if the the formula calculates an error.  You can certainly change the macro to make it return a 0 or any other value you wish.  This can be used to make your spreadsheets look nicer or to allow sum functions to calculate properly if there is an error in one of the inputs.

Sub WrapIfError()

'PURPOSE: Add an IFERROR() Function around all the selected cells' formulas
'SOURCE: www.TheSpreadsheetGuru.com

Dim rng As Range
Dim cell As Range
Dim x As String

'Determine if a single cell or range is selected
  If Selection.Cells.Count = 1 Then
    Set rng = Selection
    If Not rng.HasFormula Then GoTo NoFormulas
  Else
    'Get Range of Cells that Only Contain Formulas
      On Error GoTo NoFormulas
        Set rng = Selection.SpecialCells(xlCellTypeFormulas)
      On Error GoTo 0
  End If

'Loop Through Each Cell in Range and add =IFERROR([formula],"")
  For Each cell In rng.Cells
    x = cell.Formula
    cell = "=IFERROR(" & Right(x, Len(x) - 1) & "," & Chr(34) & Chr(34) & ")"
  Next cell

Exit Sub

'Error Handler
NoFormulas:
  MsgBox "There were no formulas found in your selection!"

End Sub

I took the above macro a step further and gave it some flexibility.  The following VBA code will cycle through wrapping the IFERROR function around formulas and either making the True output be a zero or a blank value.  Just keep running the macro until you get your desired outcome!

Sub WrapIfError_v2()

'PURPOSE: Add an IFERROR() Function around all the selected cells' formulas. _
          Also handles if IFERROR is already wrapped around formula.

'SOURCE: www.TheSpreadsheetGuru.com

Dim rng As Range
Dim cell As Range
Dim AlreadyIFERROR As Boolean
Dim RemoveIFERROR As Boolean
Dim TestEnd1 As String
Dim TestEnd2 As String
Dim TestStart As String
Dim MyFormula As String
Dim x As String

'Determine if a single cell or range is selected
  If Selection.Cells.Count = 1 Then
    Set rng = Selection
    If Not rng.HasFormula Then GoTo NoFormulas
  Else
    'Get Range of Cells that Only Contain Formulas
      On Error GoTo NoFormulas
        Set rng = Selection.SpecialCells(xlCellTypeFormulas)
      On Error GoTo 0
  End If
  
'Get formula from First cell in Selected Range
  MyFormula = rng(1, 1).Formula

'Create Test Strings To Determine if IFERROR formula has already been added
  TestEnd1 = Chr(34) & Chr(34) & ")"
  TestEnd2 = ",0)"
  TestStart = Left(MyFormula, 9)

'Determine How we want to modify formula
  If Right(MyFormula, 3) = TestEnd1 And TestStart = "=IFERROR(" Then
    Beg_String = ""
    End_String = "0)" '=IFERROR([formula],0)
    AlreadyIFERROR = True
  ElseIf Right(MyFormula, 3) = ",0)" And TestStart = "=IFERROR(" Then
    RemoveIFERROR = True
  Else
    Beg_String = "=IFERROR("
    End_String = "," & Chr(34) & Chr(34) & ")" '=IFERROR([formula],"")
    AlreadyIFERROR = False
  End If

'Loop Through Each Cell in Range and modify formula
  For Each cell In rng.Cells
    x = cell.Formula

    If RemoveIFERROR = True Then
      cell = "=" & Mid(x, 10, Len(x) - 12)
    ElseIf AlreadyIFERROR = False Then
      cell = Beg_String & Right(x, Len(x) - 1) & End_String
    Else
      cell = Left(x, Len(x) - 3) & End_String
    End If
    
  Next cell

Exit Sub

'Error Handler
NoFormulas:
  MsgBox "There were no formulas found in your selection!"
  
End Sub

How Do I Modify This To Fit My Specific Needs?

Chances are this post did not give you the exact answer you were looking for. We all have different situations and it's impossible to account for every particular need one might have. That's why I want to share with you: My Guide to Getting the Solution to your Problems FAST! In this article, I explain the best strategies I have come up with over the years to getting quick answers to complex problems in Excel, PowerPoint, VBA, you name it

I highly recommend that you check this guide out before asking me or anyone else in the comments section to solve your specific problem. I can guarantee 9 times out of 10, one of my strategies will get you the answer(s) you are needing faster than it will take me to get back to you with a possible solution. I try my best to help everyone out, but sometimes I don't have time to fit everyone's questions in (there never seem to be quite enough hours in the day!).

I wish you the best of luck and I hope this tutorial gets you heading in the right direction!

Chris "Macro" Newman :)