In message
..com of Sun, 28 Feb 2010 01:44:00 in uk.transport.london, MIG
writes
On 28 Feb, 08:32, Walter Briscoe wrote:
On 24/02/10, I entered Moorgate at 16:30 and left Euston at 16:43.
I entered Euston Square at 16:49 and left Moorgate at 17:10.
I was charged 5.80 for Euston Square entry and 6.00 for Moorgate exit.
I had already capped travel in Z1-2 on my registered Oystercard.
On 28 February 2010 03:22:49, TfL sent me an email "... Due to an
operational issue, we calculate that you are due a refund of 11.80.
This is now ready for pick-up at Moorgate. ..."
I am a little impressed.
Weekend mornings are good times for Oyster help on 0845 330 9876.
I was unable to get an explanation for the systemic failure.

This isn't the typical OSI problem that people have talked about
though, is it?

It just looks like the system was charging completely the wrong fares
to everyone and they couldn't miss it.

So I don't infer that the inexcusable situation where people are
repeatedly getting overcharged, because the system strings separate
resolved journeys into one and then decides that the resulting journey
is too long and splits it into unresolved/unstarted journeys, is
likely to be addressed in such a helpful way.

I agree I showed a failure that has been addressed less frequently.
It is also inexcusable because there is no automatic mechanism for
charging the correct fare to an unregistered card.

It is harder to demonstrate the other sort of failure.
http://www.tfl.gov.uk/tickets/oysteronline/12421.aspx (obscurely)
documents those time limits. You can also get there by navigating
http://www.tfl.gov.uk/, "Tickets", "What is Oyster?", "Pay as you go"
and search for "Maximum journey times".

It is harder to construct a charging failure involving an OSI without
doing something "perverse" since the Within Zone 1 or 2 limit was upped
to 90 minutes.

I suppose I could do something like
Monument Mansion House ~5
Mansion House LU London Blackfriars NR 40 For duration of Blackfriars LU closure.
Blackfriars Elephant & Castle ~ 10
Elephant & Castle NR Elephant & Castle LU 20
Elephant & Castle London Bridge 10
London Bridge LU London Bridge NR 40 NR gateline not Pre Pay enabled.
London Bridge (NR) St Pancras International ~20
St Pancras International NR King's Cross St. Pancras Tube LU 20
Kings Cross St.Pancras Euston ~5
Euston LU Euston Square LU 20
Euston Square Paddington (H&C) Line ~10
I don't have a figure for the OSI between the Paddington LU stations.
Paddington Temple ~25

That is more than 3 hours within zone 1.
No station is visited more than once and the start & end are different.

(The OSI times come from FOIa information, I got on 14 October 2009.)
--
Walter Briscoe