I've got this:
Select Case ComboBoxDocType.ListIndex
Case Is = 0 'First item in list
If ListBoxCoC.Text = "General Comments" Then
AutoTextToBM "EVTBookMark01", ActiveDocument.AttachedTemplate, "GeneralComments"
End If
If ListBoxCoC.Text = "Specific Comments" Then
AutoTextToBM "EVTBookMark02", ActiveDocument.AttachedTemplate, "SpecificComments"
End If
Case Is = 1 'Second item in list
AutoTextToBM "EVTBookMark01", ActiveDocument.AttachedTemplate, "Table"
Case Else 'Nothing selected
End Select

And this is where the system blocks: under each case, I do not have multiple instructions but I have multiple Ifs inducing instructions.