Generate new worksheet based on column data for LARGE spreadsheets - vba

Question

I have a spreadsheet with 800k rows and 150 columns. I'm attempting to create new worksheets based on the contents of a column. So, for example if column Y has many elements ("alpha", "beta", "gamma", etc.) then I'd like to create new worksheets named "alpha", "beta", "gamma" which contain only the rows from the original that have those respective letters. I've found two scripts that work for smaller spreadsheets, but due to the size of this particular spreadsheet, they don't work.
Here are the two scripts that I have tried:
Sub parse_data()
Dim lr As Long
Dim ws As Worksheet
Dim vcol, i As Integer
Dim icol As Long
Dim myarr As Variant
Dim title As String
Dim titlerow As Integer
vcol = 1
Set ws = Sheets("Sheet1")
lr = ws.Cells(ws.Rows.Count, vcol).End(xlUp).Row
title = "A1:C1"
titlerow = ws.Range(title).Cells(1).Row
icol = ws.Columns.Count
ws.Cells(1, icol) = "Unique"
For i = 2 To lr
On Error Resume Next
If ws.Cells(i, vcol) <> "" And Application.WorksheetFunction.Match(ws.Cells(i, vcol), ws.Columns(icol), 0) = 0 Then
ws.Cells(ws.Rows.Count, icol).End(xlUp).Offset(1) = ws.Cells(i, vcol)
End If
Next
myarr = Application.WorksheetFunction.Transpose(ws.Columns(icol).SpecialCells(xlCellTypeConstants))
ws.Columns(icol).Clear
For i = 2 To UBound(myarr)
ws.Range(title).AutoFilter field:=vcol, Criteria1:=myarr(i) & ""
If Not Evaluate("=ISREF('" & myarr(i) & "'!A1)") Then
Sheets.Add(after:=Worksheets(Worksheets.Count)).Name = myarr(i) & ""
Else
Sheets(myarr(i) & "").Move after:=Worksheets(Worksheets.Count)
End If
ws.Range("A" & titlerow & ":A" & lr).EntireRow.Copy Sheets(myarr(i) & "").Range("A1")
Sheets(myarr(i) & "").Columns.AutoFit
Next
ws.AutoFilterMode = False
ws.Activate
End Sub
this returns "overflow"
the other code that I have tried:
Sub columntosheets()
Const sname As String = "VOTERFILE_WITHABSENTEEINFORMATI" 'change to whatever starting sheet
Const s As String = "O" 'change to whatever criterion column
Dim d As Object, a, cc&
Dim p&, i&, rws&, cls&
Set d = CreateObject("scripting.dictionary")
With Sheets(sname)
rws = .Cells.Find("*", , , , xlByRows, xlPrevious).Row
cls = .Cells.Find("*", , , , xlByColumns, xlPrevious).Column
cc = .Columns(s).Column
End With
For Each sh In Worksheets
d(sh.Name) = 1
Next sh
Application.ScreenUpdating = False
With Sheets.Add(after:=Sheets(sname))
Sheets(sname).Cells(1).Resize(rws, cls).Copy .Cells(1)
.Cells(1).Resize(rws, cls).Sort .Cells(cc), 2, Header:=xlYes
a = .Cells(cc).Resize(rws + 1, 1)
p = 2
For i = 2 To rws + 1
If a(i, 1) <> a(p, 1) Then
If d(a(p, 1)) <> 1 Then
Sheets.Add.Name = a(p, 1)
.Cells(1).Resize(, cls).Copy Cells(1)
.Cells(p, 1).Resize(i - p, cls).Copy Cells(2, 1)
End If
p = i
End If
Next i
Application.DisplayAlerts = False
.Delete
Application.DisplayAlerts = True
Application.ScreenUpdating = True
End With
Sheets(sname).Activate
End Sub
Returns error with "excel does not have enough resources".
Is it possible to do what I want on my hardware?

Answer 1

You can refer to the modified subroutine in another article 'Macro for copying and pasting data to another worksheet'.
Sub CopySheet()
Dim wsAll As Worksheet
Dim wsCrit As Worksheet
Dim wsNew As Worksheet
Dim LastRow As Long
Dim LastRowCrit As Long
Dim I As Long
Set wsAll = Worksheets("All") ' change All to the name of the worksheet the existing data is on
LastRow = wsAll.Range("A" & Rows.Count).End(xlUp).Row
Set wsCrit = Worksheets.Add
' column G has the criteria eg project ref
wsAll.Range("A1:A" & LastRow).AdvancedFilter Action:=xlFilterCopy, CopyToRange:=wsCrit.Range("A1"), Unique:=True
LastRowCrit = wsCrit.Range("A" & Rows.Count).End(xlUp).Row
For I = 2 To LastRowCrit
wsAll.Copy Before:=Sheets("All")
ActiveSheet.Name = wsCrit.Range("A2")
Range("A1").CurrentRegion.AdvancedFilter Action:=xlFilterInPlace, CriteriaRange:=wsCrit.Range("A1:A2"), _
Unique:=False
wsCrit.Rows(2).Delete
Next I
Application.DisplayAlerts = False
wsCrit.Delete
Application.DisplayAlerts = True
End Sub