My list box is on a form. When a user selected list items they are stored in a column. Later when m edit button is clicked I would like to read in these values and add them onto a selected list (Listbox_selectedCategories) on the form and remove them from the other list box (Listbox_categories) The error that the VBA editor is throwing is error 381 could not get list property. Invalid property array index. I have checked both the value of x and index in the immediate window which are iterating as expected.I have also tried this without the Cstr function,same error. The compiler is highlighting the if statement as the point of error. Im sure this is some fundamental misunderstanding I would appreciate any help or direction. Thanks.
Public Sub dataLoad()
Dim x As Integer
x = 0
NewQueryForm.targetingDescription.value = ActiveCell.Offset(1, 0).value
NewQueryForm.booleanDescription.value = ActiveCell.Offset(1, 1).value
NewQueryForm.startDate.value = ActiveCell.Offset(1, 3).value
NewQueryForm.endDate.value = ActiveCell.Offset(1, 4).value
NewQueryForm.dfpCount.value = ActiveCell.Offset(1, 5).value
NewQueryForm.Text_300Rates = ActiveCell.Offset(1, 8).value
NewQueryForm.Text_160Rates = ActiveCell.Offset(2, 8).value
NewQueryForm.Text_728Rates = ActiveCell.Offset(3, 8).value
NewQueryForm.Text_PollRates = ActiveCell.Offset(4, 8).value
NewQueryForm.Text_CMRates = ActiveCell.Offset(5, 8).value
NewQueryForm.Text_ExCMRates = ActiveCell.Offset(6, 8).value
Call NewQueryForm_Initialize
Sheets("CAT").Activate
Range("A1").Activate
ActiveCell.Offset(0, loopCount).Activate
While ActiveCell.Offset(1, 0).value <> ""
x = x + 1
Dim index As Integer
'Adding and removing items from list
NewQueryForm.ListBox_selectedCategories.AddItem ActiveCell.Offset(x - 1, 0).value
For index = 0 To NewQueryForm.ListBox_categories.ListCount - 1
If CStr(NewQueryForm.ListBox_categories.List(index)) = ActiveCell.Offset(x - 1, 0).value Then
NewQueryForm.ListBox_categories.RemoveItem (index)
End If
Next index
'Adding and Subtracting from global percent label variables
selectedCategoryLabel = selectedCategoryLabel + categoryPercent(ActiveCell.Offset(x - 1, 0).value)
categoryLabel = categoryLabel - categoryPercent(ActiveCell.Offset(x - 1, 0).value)
'Setting next cell down active
ActiveCell.Offset(1, 0).Activate
Wend
'updating labels
NewQueryForm.selectedPercent.Caption = CStr(Round(selectedCategoryLabel, 2)) & "%"
NewQueryForm.categoryPercent = CStr(Round(categoryLabel, 2)) & "%"
NewQueryForm.Show
End Sub

listboxand can you provide the entiresubroutineplease? coz there are no declarations onxand thisactiveCellevents. What's the event you are triggering this? Are you using abutton click?add items into list from an Arrayat once, instead of one by one. Run the code and please comment. You will see where the error is ;) you just need to add two word line to your code... :)