Error 91 in class function - excel

Question

Using Access 2010, I'm gathering information and dropping it on an Excel spreadsheet. When I run the code below, I'm getting
Run-time error '91':Object variable or With block not set
in my class on this line Set Cci = ChartColorItems(ColorID) in Public Function GetRGB(ByRef ColorID As String) As Integer
The 'ChartColors' class:
Option Compare Database
Option Explicit
Private pChartColorItems As Collection
Public Property Get ChartColorItems() As Collection
Set ChartColorItems = pChartColorItems
End Property
Public Property Set ChartColorItems(ByRef lChartColorItem As Collection)
Set pChartColorItems = lChartColorItem
End Property
Public Function GetRGB(ByRef ColorID As String) As Integer
Dim Cci As ChartColorItem
Dim x As Integer
'---------------------------------------------------
'Error happens here:
Set Cci = ChartColorItems(ColorID)
'---------------------------------------------------
x = RGB(Cci.Red, Cci.Green, Cci.Blue)
GetRGB = x
Set Cci = Nothing
End Function
Private Sub Class_Initialize()
Dim Cci As ChartColorItem
Dim Colors As Collection
Set Colors = New Collection
Set Cci = New ChartColorItem
Cci.Red = 149
Cci.Green = 55
Cci.Blue = 53
Cci.ColorID = "Pie1"
Colors.Add Cci, Key:=Cci.ColorID
Set Cci = Nothing
Set Cci = New ChartColorItem
Cci.Red = 148
Cci.Green = 138
Cci.Blue = 84
Cci.ColorID = "Pie2"
Colors.Add Cci, Key:=Cci.ColorID
Set Cci = Nothing
End Sub
and the ChartColorItem class:
Option Compare Database
Option Explicit
Private pColorID As String
Private pRed As Integer
Private pGreen As Integer
Private pBlue As Integer
Public Property Get ColorID() As String
ColorID = pColorID
End Property
Public Property Let ColorID(ByRef x As String)
pColorID = x
End Property
Public Property Get Red() As Integer
Red = pRed
End Property
Public Property Let Red(ByRef x As Integer)
pRed = x
End Property
Public Property Get Green() As Integer
Green = pGreen
End Property
Public Property Let Green(ByRef x As Integer)
pGreen = x
End Property
Public Property Get Blue() As Integer
Blue = pBlue
End Property
Public Property Let Blue(ByRef x As Integer)
pBlue = x
End Property
When I debug, the code steps through the ChartColorItems() getter just fine, the error happens after the End Function, and drops me on the line noted above.
This is very similar to some code I wrote earlier this week, the main difference is that I'm populating my ChartColors by using the Class_Initialize sub, since I'm trying to store off a fixed set of colors, whereas my earlier code was gathering data and inserting it into the class in a more 'normal' way.

Answer 1

You defined the private collection at the module level as pCharColorItems, but you never initialize it in the class' intialize method. Instead, you use a locally scoped Colors collection variable.
Private Sub Class_Initialize()
Dim Cci As ChartColorItem
Dim Colors As Collection
Set Colors = New Collection
You need to use pChartColorItems instead.
Private Sub Class_Initialize()
Dim Cci As ChartColorItem
Dim Colors As Collection
Set pChartColorItems = New Collection
Set Cci = New ChartColorItem
Cci.Red = 149
Cci.Green = 55
Cci.Blue = 53
Cci.ColorID = "Pie1"
pChartColorItems.Add Cci, Key:=Cci.ColorID
Set Cci = Nothing
Set Cci = New ChartColorItem
Cci.Red = 148
Cci.Green = 138
Cci.Blue = 84
Cci.ColorID = "Pie2"
pChartColorItems.Add Cci, Key:=Cci.ColorID
Set Cci = Nothing
End Sub
But there's another bug on this line of GetRGB.
x = RGB(Cci.Red, Cci.Green, Cci.Blue)
You declared x as an Integer, when the RGB function returns a long. The value of "Pie1" causes an overflow error.