Public Object loses scope in another module??

nigelandrewfoster

Well-known Member
Joined
May 27, 2009
Messages
747
Hello,

I confess I am relatively new to classes. I have declared an object variable at the top of module A thus:

Code:
   Public Teams As Collection

The object is created in a procedure called "Create_Objects", also in module A:

Code:
   Set Teams = New Collection

Without going into too much detail, this collection is working fine when referenced by procedures in the A module. As soon as execution switches to a procedure in module B, an attempt to reference this object results in "438: Object does not support this property or method"??

I stopped the code on the line immediately before (the last line in the A module procedure) and I got the correct result from typing "?Teams(1).Name" in the immediate window. As soon as execution was in module B, the error occurred. I thought Public meant Public...?

Thanks for your concern.
 

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How are you populating the collection Teams?

How is execution switching between modules/subs?
 
Upvote 0
Hello Norie. Thanks again for your assistance. Just found a big clue and solved the issue, but could do with knowing how I did it. The Teams collection is a member of Tournament. I can reference Teams within module A by just using Teams. When execution passes to module B (through a procedure call, initially triggered by a worksheet event, to answer your second question) I have to use Tournament.Teams. I would have expected some consistency - i.e. that I would be required to fully state the reference on every occasion, or not...?

Here's how I'm populating it:

Code:
Sub Create_Objects()

   Dim oRound As clsRound
   Dim oGame As clsGame
   Dim oTeam As clsTeam
   Dim aoTeam() As clsTeam
   Dim lngRound As Long
   Dim lngGame As Long
   Dim lngGameCount As Long
   Dim lngTeam As Long
   Dim blnTeamsEven As Boolean


   Set oTournament = New clsTournament
   Set Rounds = New Collection
   Set Teams = New Collection
   
   ReDim aoTeam(lngNoofTeams)
   
   blnTeamsEven = (lngNoofTeams / 2 = Int(lngNoofTeams / 2)) ' True if number of teams is even
   lngNoOfRounds = lngNoRounds() ' Calculate no of rounds
   lngNoOfGames = lngNoGames() ' Calculate no of games per round
    
   For lngTeam = 1 To lngNoofTeams ' Create all the Team objects, add them to Teams collection and retrieve names from Data sheet
      Set oTeam = New clsTeam
      Teams.Add oTeam
      Set aoTeam(lngTeam) = oTeam
   Next
    
   Set oTournament.TeamAdd = Teams ' Add teams to Tournament Teams collection

   Blah... Blah... Blah...

 End Sub

Names are added here:

Code:
Sub Populate_Team_Names()   
   Dim oTeam As clsTeam
   Dim lngTeam As Long
   
   lngTeam = 1
   
   For Each oTeam In Teams ' Retrieve team names from Data sheet
      oTeam.Name = Range("Team_Names").Offset(lngTeam).Value
      oTeam.Colour = Range("Team_Names").Offset(lngTeam).Interior.Color
      lngTeam = lngTeam + 1
   Next
   
End Sub
 
Last edited:
Upvote 0
Where exactly did you declare Teams?

If I declare Teams in a standard module I can refer to it in other modules simply using Teams.

Is there anything else going on in your code?
 
Upvote 0
In a standard module, Main_Procs: (I can send you the workbook, but only if you're curious! Don't want to impose)

Code:
Option Explicit   Public Rounds As Collection
   Public Teams As Collection
   Public Games As Collection
   Public oTournament As clsTournament
   Public lngNoofTeams As Long
   Public lngNoOfRounds As Long
   Public lngNoOfGames As Long
   Public Const lngWhite As Long = 16777215
   Public Const lngDark_Blue As Long = 10027008
   Public Const lngLight_Blue As Long = 16711680
   
   Public Const blnDeveloper As Boolean = False
   
   Public Enum Os
      ePlayed = 1
      eWon
      eDrew
      eLost
      eFor
      eAgainst
      ePoints
      eGoalDifference
   End Enum
   
Sub New_Tournament()
   
   If MsgBox("Do you want to start a new tournament?" & vbCr & vbCr & _
         "Warning: This will reset EVERYTHING and is irreversible", vbYesNo) = vbYes Then
   
      How_Many_Teams lngNoofTeams
      
      If lngNoofTeams > 0 Then
         Initialise_Team_List
         Application.ScreenUpdating = False
         Create_Objects
         Populate_Team_Names
         Reset_Scores
         Table_Construction
         Application.ScreenUpdating = True
      Else
         MsgBox "Cancelled"
      End If
   
   End If
   
End Sub


Sub How_Many_Teams(ByRef lngNoofTeams As Long)
   Dim vInput As Variant
   Dim blnValid As Boolean


   Do
      vInput = InputBox("No. of teams? 2-32")
      If IsNumeric(vInput) Then
         vInput = Int(vInput)
         If vInput >= 2 And vInput <= 32 Then blnValid = True
      End If
   Loop Until blnValid = True Or vInput = ""
   
   If vInput <> "" Then lngNoofTeams = Val(vInput)
End Sub
Sub Initialise_Team_List()
   
   Dim I As Long
   
   Range("Team_Names").Offset(1).Resize(32).EntireRow.Hidden = False
   If lngNoofTeams < 32 Then Range("Team_Names").Offset(lngNoofTeams + 1).Resize(32 - lngNoofTeams).EntireRow.Hidden = True
   
   With Worksheets("Teams")
      .Range("Team_Names").Offset(1).Resize(32).ClearContents
      .Select
   End With
   
   For I = 1 To lngNoofTeams
      Range("Team_Names").Offset(I) = "Team " & Chr(64 + I - ((I > 26) * 6))
   Next
   
End Sub
Sub Get_No_Of_Teams()
   lngNoofTeams = lngNoTeams()
   lngNoOfRounds = lngNoRounds()
   lngNoOfGames = lngNoGames()
End Sub
Sub Create_Objects()


   Dim oRound As clsRound
   Dim oGame As clsGame
   Dim oTeam As clsTeam
   Dim aoTeam() As clsTeam
   Dim lngRound As Long
   Dim lngGame As Long
   Dim lngGameCount As Long
   Dim lngTeam As Long
   Dim blnTeamsEven As Boolean


   Set oTournament = New clsTournament
   Set Rounds = New Collection
   Set Teams = New Collection
   
   ReDim aoTeam(lngNoofTeams)
   
   blnTeamsEven = (lngNoofTeams / 2 = Int(lngNoofTeams / 2)) ' True if number of teams is even
   lngNoOfRounds = lngNoRounds() ' Calculate no of rounds
   lngNoOfGames = lngNoGames() ' Calculate no of games per round
    
   For lngTeam = 1 To lngNoofTeams ' Create all the Team objects, add them to Teams collection and retrieve names from Data sheet
      Set oTeam = New clsTeam
      Teams.Add oTeam
      Set aoTeam(lngTeam) = oTeam
   Next
    
   Set oTournament.TeamAdd = Teams ' Add teams to Tournament Teams collection
    
   For lngRound = 1 To lngNoOfRounds
      Set oRound = New clsRound
      Set Games = New Collection
      Rounds.Add oRound
      oRound.Name = "Round " & lngRound
        
      lngGameCount = 1
      
      For lngGame = 2 + blnTeamsEven To lngNoOfGames + blnTeamsEven + 1
         Set oGame = New clsGame
         Games.Add oGame
         
         With oGame
            .Name = "Game " & lngGameCount
            .HomeTeam = aoTeam(lngGame)
            .AwayTeam = aoTeam(lngNoofTeams - lngGame + 2 + blnTeamsEven)
            .HomeTeam.Games.Add oGame
            .AwayTeam.Games.Add oGame
         End With
         
         lngGameCount = lngGameCount + 1
      Next lngGame
        
      Set oRound.GameAdd = Games
      Call Rotate(aoTeam(), blnTeamsEven)
   Next lngRound
    
   Set oTournament.RoundAdd = Rounds
    
   Set oTeam = Nothing
   Set oRound = Nothing
   Set oGame = Nothing
   Set Games = Nothing


End Sub
Sub Populate_Team_Names()
   
   Dim oTeam As clsTeam
   Dim lngTeam As Long
   
   lngTeam = 1
   
   For Each oTeam In Teams ' Retrieve team names from Data sheet
      oTeam.Name = Range("Team_Names").Offset(lngTeam).Value
      oTeam.Colour = Range("Team_Names").Offset(lngTeam).Interior.Color
      lngTeam = lngTeam + 1
   Next
   
End Sub
Sub Reset_Scores()


   Dim lngRound As Long
   Dim lngGame As Long
   
   For lngRound = 1 To lngNoOfRounds
      For lngGame = 1 To lngNoOfGames
         With Rounds(lngRound).Games(lngGame)
            .HomeGoals = -1
            .AwayGoals = -1
         End With
      Next
   Next


End Sub




Sub Rotate(ByRef aoTeam() As clsTeam, blnTeamsEven As Boolean)
   Dim e As Integer
   Dim v1 As clsTeam
   
   Set v1 = aoTeam(1)
   
   For e = 2 To UBound(aoTeam()) + blnTeamsEven
      Set aoTeam(e - 1) = aoTeam(e)
   Next
   
   Set aoTeam(UBound(aoTeam()) + blnTeamsEven) = v1
End Sub
Function lngNoTeams() As Long
   Dim r As Range
   
   For Each r In Range("Team_Names").Offset(1).Resize(32)
      If r.EntireRow.Hidden = False Then lngNoTeams = lngNoTeams + 1
   Next


End Function


Function lngNoRounds() As Long
   lngNoRounds = lngNoofTeams + (lngNoofTeams / 2 = Int(lngNoofTeams / 2))
End Function


Function lngNoGames() As Long
   lngNoGames = (lngNoofTeams - (lngNoofTeams / 2 = Int(lngNoofTeams / 2))) / 2
End Function


Sub Change_Team_Names()
   Worksheets("Teams").Activate
End Sub
Sub Goto_League_Table()
   Worksheets("Fixtures").Activate
End Sub
Sub Goto_Knockout_Rounds()
   Worksheets("Finals").Activate
End Sub
Sub Quit()
   ThisWorkbook.Close
End Sub
Sub Save_Tournament()
   ThisWorkbook.Save
End Sub
Sub Splash_Screen()
   Worksheets("Title").Activate
   [a1].Select
   [h15].Select
End Sub
 
Last edited:
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