Hania said, however, it is more likely that a network error or system failure caused the problem.

CNN: Microsoft Web sites suffer large scale blackout

The prosecution told jurors that although it may be a case of human error, Mr Maund's employer, Network Rail, is equally culpable for Mrs Harding's death.

BBC: Jane Harding

Occasionally it may simply be a network error, so it's worth closing your browser or router and reopening as a new IP address is allocated which may be UK-based.

BBC: Your guide to the BBC Embedded Media Player

The railway companies complain that only 3% of crashes are caused by the sort of human error that PTC is designed to avert and that claims that the system will improve efficiency on the network are unfounded.

ECONOMIST: American railways