EXCEL VBA , Search Line Error 1004 - vba

Question

I am trying to run an excel vba form to search through the lines, but for some unknown reason I get the error:
Method Range of object Global failed
Private Sub CommandButton3_Click()
Dim last, i As Integer
Dim ref, lote As String
'Sheets("analisegeral").Visible = True
Sheets("analisegeral").Select
last = Range("analisegeral").End(xlUp).Row + 1
For i = 2 To last ref = Cells(i, 8)
lote = Cells(i, 13)
If TextBox1.Text = ref Then
TextBox2.Text = lote
GoTo fim
End If
Next i
If TextBox1.Text <> ref Then
TextBox2.Text = ""
MsgBox "Referência não encontrada!", vbInformation
TextBox1.Text = ""
TextBox2.Text = ""
GoTo fim
End If
fim:
End Sub

Answer 1

There are few issues with your code.
Invalid declaration
Dim last, i As Integer
Dim ref, lote As String
Note that last and ref are declared as Variant type here, unless it was your intent, change it to following:
Dim last As Integer, i As Integer
Dim ref As String, lote As String
Failing to activate worksheet where range is located
'Sheets("analisegeral").Visible = True
Sheets("analisegeral").Select
The fact that your sheet is hidden (or very hidden) disallows it's selection.
Probably this is the case of your error.
Wrong method of calculating last row number
last = Range("analisegeral").End(xlUp).Row + 1
Given you will actualy select analisegeral sheet, this still doesn't make sense:
Range("NamedRange") is a construction that allows to refer to previously named range (either with VBA or manualy). Unless you have one, this will raise another error. Perhaps you meant something like this?
last = Range("A" & Rows.Count).End(xlUp).Row
This will give you a number of column A last row.
Final advice: avoid using Select