Endless VBA Loop UNLESS I step through the code - excel

Question

I have a userform with 6 list objects. All of the list objects have named range rowsources. Clicking any one item in any one list will reference a chart on a spreadsheet and clear contents of any item's cell that does not belong with what was selected (explained better at the bottom of this, if you're interested). All of my list objects only have "After Update" triggers, everything else is handled by private subs.
Anyway, there's a lot of looping and jumping from list to list. If I run the userform normally, it endlessly loops. It seems to run through once, and then acts as though the user has again clicked the same item in the list, over and over again.
The odd thing is, if I step through the code (F8), it ends perfectly, when it's supposed to and control is returned to the user.
Does anyone have any thoughts on why that might be?
EDIT: I didn't originally post the code because all of it is basically a loop, and there's 150+ lines of it. I don't understand how it can be the code if stepping through makes it work perfectly, but allowing it to run regular makes it endless loop. Anyway, here's the code:
Option Explicit
Dim arySelected(6) As String
Dim intHoldCol As Integer, intHoldRow As Integer
Dim strHold As String
Dim rngStyleFind As Range, rngStyleList As Range
Private Sub UserForm_Activate()
Set rngStyleList = Range("Lists_W_Style")
Set rngStyleFind = Range("CABI_FindStyle")
End Sub
Private Sub lstStyle_AfterUpdate()
If lstStyle.ListIndex >= 0 Then
arySelected(0) = lstStyle.Value
Call FilterCabinetOptions(Range("Lists_W_Style"), Range("CABI_FindStyle"), 0)
End If
End Sub
Private Sub lstWood_AfterUpdate()
If lstWood.ListIndex >= 0 Then
arySelected(1) = lstWood.Value
Call FilterCabinetOptions(Range("Lists_W_Wood"), Range("CABI_FindWood"), 1)
' lstWood.RowSource = "Lists_W_Wood"
End If
End Sub
Private Sub cmdReset_Click()
Range("Lists_S_Style").Copy Destination:=Range("Lists_W_Style")
Call RemoveXes(Range("Lists_W_Style"))
Range("Lists_S_Wood").Copy Destination:=Range("Lists_W_Wood")
Call RemoveXes(Range("Lists_W_Wood"))
Range("Lists_S_Door").Copy Destination:=Range("Lists_W_Door")
Call RemoveXes(Range("Lists_W_Door"))
Range("Lists_S_Color").Copy Destination:=Range("Lists_W_Color")
Call RemoveXes(Range("Lists_W_Color"))
Range("Lists_S_Glaze").Copy Destination:=Range("Lists_W_Glaze")
Call RemoveXes(Range("Lists_W_Glaze"))
Range("Lists_S_Const").Copy Destination:=Range("Lists_W_Const")
Call RemoveXes(Range("Lists_W_Const"))
Range("Lists_S_DrawFrontConst").Copy Destination:=Range("Lists_W_DrawFrontConst")
Call RemoveXes(Range("Lists_W_DrawFrontConst"))
End Sub
Private Sub FilterCabinetOptions(rngList As Range, rngFind As Range, intAry As Integer)
Dim intListCntr As Integer, intFindCntr As Integer, intStyleCntr As Integer
If intAry = 0 Then
Call FindStyle(arySelected(intAry))
Else
'Save the List item.
For intListCntr = 1 To rngList.Rows.Count
If rngList.Cells(intListCntr, 1) = arySelected(intAry) Then
rngList.Cells(intListCntr, 3) = "X"
' Call RemoveNonXes(rngList)
Exit For
End If
Next intListCntr
'Save the column of the Find List.
For intFindCntr = 1 To rngFind.Columns.Count
If rngFind.Cells(1, intFindCntr) = arySelected(intAry) Then
'Minus 2 to allow for columns A and B when using Offset in the below loop.
intHoldCol = rngFind.Cells(1, intFindCntr).Column - 2
Exit For
End If
Next intFindCntr
'Find appliciple styles.
For intStyleCntr = 1 To rngStyleFind.Rows.Count
If Len(rngStyleFind.Cells(intStyleCntr, intHoldCol)) > 0 Then
Call FindStyle(rngStyleFind.Cells(intStyleCntr, 1))
End If
Next intStyleCntr
End If
Call RemoveNonXes(rngStyleList)
Call RemoveNonXes(Range("Lists_W_Wood"))
Call RemoveNonXes(Range("Lists_W_Door"))
Call RemoveNonXes(Range("Lists_W_Color"))
Call RemoveNonXes(Range("Lists_W_Glaze"))
Call RemoveNonXes(Range("Lists_W_Const"))
Call RemoveNonXes(Range("Lists_W_DrawFrontConst"))
End Sub
Private Sub FindStyle(strFindCode As String)
Dim intListCntr As Integer, intFindCntr As Integer
For intListCntr = 1 To rngStyleList.Rows.Count
If rngStyleList.Cells(intListCntr, 1) = strFindCode Then
rngStyleList.Range("C" & intListCntr) = "X"
Exit For
End If
Next intListCntr
For intFindCntr = 1 To rngStyleFind.Rows.Count
If rngStyleFind.Cells(intFindCntr, 1) = strFindCode Then
intHoldRow = rngStyleFind.Cells(intFindCntr).Row
Exit For
End If
Next intFindCntr
If Len(arySelected(1)) = 0 Then Call FindStyleOptions(Range("CABI_FindWood"), Range("Lists_W_Wood"))
If Len(arySelected(2)) = 0 Then Call FindStyleOptions(Range("CABI_FindDoor"), Range("Lists_W_Door"))
If Len(arySelected(3)) = 0 Then Call FindStyleOptions(Range("CABI_FindColor"), Range("Lists_W_Color"), Range("Lists_W_Wood"))
If Len(arySelected(4)) = 0 Then Call FindStyleOptions(Range("CABI_FindGlaze"), Range("Lists_W_Glaze"), Range("Lists_W_Wood"))
If Len(arySelected(5)) = 0 Then Call FindStyleOptions(Range("CABI_FindConst"), Range("Lists_W_Const"))
If Len(arySelected(6)) = 0 Then Call FindStyleOptions(Range("CABI_FindDrawFrontConst"), Range("Lists_W_DrawFrontConst"))
End Sub
Private Sub FindStyleOptions(rngFind As Range, rngList As Range, Optional rngCheckList As Range)
Dim intListCntr As Integer, intFindCntr As Integer
Dim intStrFinder As Integer, intCheckCntr As Integer
Dim strHoldCheck As String
Dim strHoldFound As String, strHoldOption As String
'Go through the appropriate find list (across the top of CABI)
For intFindCntr = 1 To rngFind.Columns.Count
strHoldOption = rngFind.Cells(1, intFindCntr)
strHoldFound = rngFind.Cells(1, intFindCntr).Offset((intHoldRow - 1), 0)
If Len(strHoldFound) > 0 Then
If rngCheckList Is Nothing Then
For intListCntr = 1 To rngList.Rows.Count
If rngList.Cells(intListCntr, 1) = strHoldFound Then
Call AddXes(rngList, strHoldFound, "X")
Exit For
End If
Next intListCntr
Else
intStrFinder = 1
Do While intStrFinder < Len(rngFind.Cells(1, intFindCntr).Offset((intHoldRow - 1), 0))
strHoldCheck = Mid(rngFind.Cells(1, intFindCntr).Offset((intHoldRow - 1), 0), intStrFinder, 2)
intStrFinder = intStrFinder + 3
For intCheckCntr = 1 To rngCheckList.Rows.Count
If strHoldCheck = rngCheckList(intCheckCntr, 1) And Len(rngCheckList(intCheckCntr, 3)) > 0 Then
Call AddXes(rngList, strHoldOption, "X")
intStrFinder = 99
Exit For
End If
Next intCheckCntr
Loop
End If
End If
Next intFindCntr
End Sub
Private Sub AddXes(rngList As Range, strToFind As String, strX As String)
Dim intXcntr As Integer
For intXcntr = 1 To rngList.Rows.Count
If rngList.Cells(intXcntr, 1) = strToFind Then
rngList.Cells(intXcntr, 3) = strX
Exit For
End If
Next intXcntr
End Sub
Private Sub RemoveNonXes(rngList As Range)
Dim intXcntr As Integer
For intXcntr = 1 To rngList.Rows.Count
If Len(rngList(intXcntr, 3)) = 0 Then
rngList.Range("A" & intXcntr & ":B" & intXcntr) = ""
Else
rngList.Range("C" & intXcntr) = ""
End If
Next intXcntr
End Sub
Private Sub RemoveXes(rngList As Range)
rngList.Range("C1:C" & rngList.Rows.Count) = ""
End Sub
Explanation:
Imagine you had 6 lists with different automobile conditions. So Make would be one list with Chevy, Ford, Honda... Model would be another with Malibu, Focus, Civic... But you'd also have Color Blue, Red, Green... So if your user wants a Green car, the program references an inventory list and gets rid of any Makes, Models, etc... not available in green. Likewise the user could click on Civic from the Model list and it would elminate all but Honda from the Make and so on. That's what I'm trying to do anyway.

Answer 1

Without seeing the code it's tough to tell. When you run the script, the 'AfterUpdate' event may be getting triggered over and over, causing the endless loop. Try using a counter to limit the update to one change and have it exit the loop once the counter is greater than 0.