I have had boat routes not supply anything when frequency is too low . I have also accidentally at times inserted a passenger rail station instead of a cargo rail station and that kills the line also . <| sep |> Many years ago I switched from the student CIBC card to their free Dividends card and the teller assured me that they would be simply altering my existing account . She then did the opposite closed my student card account and separately applied for a new Dividends card . After many calls I was told with finality that they simply would not reopen the nowclosed student card . I lost my oldest card , the teller got 1 on her daily credit card signups , and CIBC lost a customer . So be careful . The customer service reps did confirm after the fact that it was very possible for a teller to switch me from one card to the other , it ' s just that she didn ' t . There was no credit check though , because I already had that amount of credit approved with the bank they just reallocated it or whatever terms they use .