VBA Data Validation populate error in For Next loop

Rowland Hamilton

Active Member
Joined
Nov 13, 2009
Messages
250
Can anyone explain why this code breaks on row 21,833 after working since row 8? Note: vntMatch is defined as variant and does not change. UsedRange is getting the proper row count (27,852)
Dim vntMatch As Variant

Code:
 vntMatch = Application.Match("Manual", shtCashForecast.Range("7:7"), 0)
   If Not IsError(vntMatch) Then
        'Loop through Manual column, offsets to start with cell under header.
        For Each rCell In shtCashForecast.Range("7:7").Cells(1, vntMatch).Offset(1, 0).Resize(shtCashForecast.UsedRange.Rows.Count, 1).Cells
            
            'Adds validation to Manual column cells if total forecast for row > 0
            'Changing offset from -1 to -3 since added 2 columns
            If InStr(rCell.Offset(0, -3).Formula, "=") > 0 Then
                With rCell.Validation
                    .Delete
                    .Add Type:=xlValidateList, AlertStyle:=xlValidAlertStop, Operator:= _
                    xlBetween, Formula1:="=ManualMonths"
                    .IgnoreBlank = True
                    .InCellDropdown = True
                    .InputTitle = ""
                    .ErrorTitle = ""
                    .InputMessage = ""
                    .ErrorMessage = ""
                    .ShowInput = True
                    .ShowError = True
                End With
            End If
        Next
   End If
 

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Correction: Doesn't break on Instr, but rather on

Code:
                    .Add Type:=xlValidateList, AlertStyle:=xlValidAlertStop, Operator:= _
                    xlBetween, Formula1:="=ManualMonths"
 
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