Link 2 Data Validation Cells - excel

Question

I am trying to link 2 cells that have data validation lists in them so that when 1 of the cells (ex. cell A2) is filled with the SKU in from a selection in the dropdown list, cell B2 will be filled with the SKU description and vice versa.
See the pictures below with that I have so far. I have named the columns:
Column A = a_val
Column B = b_val
SKU column with values = vrac
SKU description column with values = vrac_description
Table with SKUs and SKU descriptions = description
See the attached pictures for what I currently have.
1 sheet is the empty fields, I have data validation lists on columns A and B since I want to be able to have the option to select either from column A or column B but would like either one to auto-populate when I've selected an item from the list in the opposite cell
Thank you!
Private Sub Worksheet_Change(ByVal Target As Range)
If Not Intersect(Target, Range("a_val")) Is Nothing Then
With Application.WorksheetFunction
UI False
Range("b_val").Value = .Index(Range("vrac_description").Value, .Match(Range("a_val").Value, Range("description").Value, 0))
UI True
End With
ElseIf Not Intersect(Target, [b_val]) Is Nothing Then
With Application.WorksheetFunction
UI False
[a_val].Value = .Index([vrac], .Match([b_val], [vrac_description], 0))
UI True
End With
End If
End Sub
Public Sub UI(t As Boolean)
Application.EnableEvents = t
Application.ScreenUpdating = t
End Sub
Current Code
Main Sheet
Data Validation Lookup
[EDIT} New code attempt:
Private Sub Worksheet_Change(ByVal Target As Range)
If Not Intersect(Target, a_val) Is Nothing Then
With Application.WorksheetFunction
UI False
'b_val = .VLookup(Target, Description, 1, 0)
Range(Target.Column + 1).Value = .Index(vrac_description, .Match(Target.Value, vrac, 0))
UI True
End With
ElseIf Not Intersect(Target, b_val) Is Nothing Then
With Application.WorksheetFunction
UI False
'Range(Target.Column - 1).Value = .VLookup(Target.Value, Description, 1, 0)
Range(Target.Column - 1).Value = .Index(vrac, .Match(Target.Value, vrac_description, 0))
UI True
End With
End If
End Sub

Answer 1

Option Explicit
Private Sub Worksheet_Change(ByVal Target As Range)
Msgbox "Target=" & Target.Address
On Error GoTo errorexit
Dim r, i As Long, cell As Range
i = Target.Column
If i > 2 Or Target.Value = "" Then Exit Sub
Set cell = Target.Offset(, 3 - i * 2)
With Sheets("Data_Validation").ListObjects("description").DataBodyRange
r = Application.Match(Target.Value, .Columns(i), 0)
If Not IsError(r) Then
Application.EnableEvents = False
cell = .Cells(r, 3 - i).Value
Else
MsgBox Target.Value & " not found in column " & i
End If
End With
errorexit:
Application.EnableEvents = True
End Sub
Your code corrected
Private Sub Worksheet_Change(ByVal Target As Range)
On Error GoTo exiterror
Dim a_val As Range, b_val As Range
Dim vrac As Range, vrac_description As Range
' define ranges
With ThisWorkbook
Set a_val = .Names("a_val").RefersToRange
Set b_val = .Names("b_val").RefersToRange
Set vrac = .Names("vrac").RefersToRange
Set vrac_description = .Names("vrac_description").RefersToRange
End With
If Not Intersect(Target, a_val) Is Nothing Then
With Application.WorksheetFunction
UI False
Target.Offset(, 1).Value = .Index(vrac_description, .Match(Target.Value, vrac, 0))
UI True
End With
ElseIf Not Intersect(Target, b_val) Is Nothing Then
With Application.WorksheetFunction
UI False
Target.Offset(, -1).Value = .Index(vrac, .Match(Target.Value, vrac_description, 0))
UI True
End With
End If
exiterror:
Application.EnableEvents = True
End Sub