How to use named ranged as reference for validation - excel

Question

Hoping I can get help here, I am currently using the Dim Long in my VBA code but since I am referring to multiple columns the code became quite long. Now, I wanted to try named range reference instead but i cannot make it work.
This is my current code:
Dim i As Long
For i = 8 To 500
'if details is incomplete
If Range("AA" & i).Value > 0 Then
If Range("AB" & i).Value = "Error" Or Range("AC" & i).Value = "Error" Or Range("AD" & i).Value = "Error" _
Or Range("AE" & i).Value = "Error" Or Range("AF" & i).Value = "Error" Or Range("AG" & i).Value = "Error" _
Or Range("AH" & i).Value = "Error" Or Range("AI" & i).Value = "Error" Or Range("AJ" & i).Value = "Error" _
Or Range("AK" & i).Value = "Error" Or Range("AL" & i).Value = "Error" Or Range("AM" & i).Value = "Error" _
Or Range("AN" & i).Value = "Error" Or Range("AO" & i).Value = "Error" Or Range("AP" & i).Value = "Error" _
Or Range("AQ" & i).Value = "Error" Or Range("AR" & i).Value = "Error" Or Range("AS" & i).Value = "Error" _
Or Range("AT" & i).Value = "Error" Or Range("AU" & i).Value = "Error" Or Range("AV" & i).Value = "Error" _
Or Range("AW" & i).Value = "Error" Or Range("AX" & i).Value = "Error" Or Range("AY" & i).Value = "Error" Then
MsgBox "One of the mandatory field is not provided, please check all cells highlighted in yellow & make sure details is provided."
End If
Endif
I named range AA = "Validation" & range AB:AY = "Details" how can i declare it and use named range instead of writing each columns one by one?

Answer 1

As #Ike suggests - use the COUNTIF formula. Can be used on the worksheet or within VBA. If you want to return the addresses of each error then Find might be a better route.
Sub Test()
Dim Result As Long
Result = Errors(Sheet1.Range("AB8:AY500"))
If Result > 0 Then
MsgBox "There are " & Result & " errors in the range."
End If
End Sub
Public Function Errors(Target As Range) As Long
Errors = WorksheetFunction.CountIf(Target, "Error")
End Function

Answer 2

Conditional formatting can handle this. I have demonstrated for a smaller range. Feel free to apply it for your required range.
NON VBA
Formula used: =AND($AA8>0,AB8="Error")
VBA
You can use conditonal formatting in VBA as well.
I have commented the code.
Option Explicit
Sub Sample()
Dim i As Long
Dim ws As Worksheet
Dim CondTrue As Boolean
'~~> Change this to the relevant sheet
Set ws = ThisWorkbook.Sheets("Sheet1")
With ws
'~~> Check if there is even one cell which satisfies our condition
For i = 8 To 500
If .Evaluate("=AND(AA" & i & ">0,COUNTIF(AB" & i & ":AY" & i & ",""Error"")>0)") = True Then
CondTrue = True
Exit For
End If
Next i
'~~> If found then apply conditional formatting
If CondTrue Then
With .Range("AB8:AY500")
.FormatConditions.Delete
.FormatConditions.Add Type:=xlExpression, _
Formula1:="=AND($AA8>0,AB8=""Error"")"
.FormatConditions(.FormatConditions.Count).SetFirstPriority
With .FormatConditions(1).Interior
.PatternColorIndex = xlAutomatic
.Color = 65535
.TintAndShade = 0
End With
.FormatConditions(1).StopIfTrue = False
End With
'~~> Show message box
MsgBox "One of the mandatory field is not provided, please check all cells highlighted in yellow & make sure details is provided."
Else
MsgBox "All Good!"
End If
End With
End Sub
IN ACTION (VBA)