The phrase 'mistake occurs' is correct and usable in written English.
This phrase can be used when someone makes an error or a mistake. For example, "Whenever a mistake occurs, it's important to take responsibility and learn from it."
(For music fans, the piece is Brahms's Opus 76, No. 2, and the mistake occurs 42 measures from the end).
The New Yorker, October 2, 1926 P. 17 Mistake occurs in The World newspaper about Vice-president Dawes and President Coolidge's guide with a dog.
The current system creates such a contentious atmosphere that some physicians are discouraged, even by their own attorneys, from offering an honest apology to a patient when a mistake occurs.
Another mistake occurs during the intro to My Country, the opening track on forthcoming album Whokill, but the song is such an exercise in dragging art out of cacophony - I especially like the skronking TV on the Radio-style horns - that you're left amazed she ever got it up and running at all.
Jorie Graham, from "Embodies": "Deep autumn & the mistake occurs, the plum tree blossoms, twelve / blossoms on three different / branches, which for us, personally, means none this coming spring…" Tracy K. Smith, from "One Man at a Time": "I take a man in my arms and my eyes roll back, like a doll that needs to be sat up".
These alpha bursts when a mistake occurs require more detailed analysis.
O'Neill has traced how Vodafone's mistake occurred.
Eight years after the passage of the Vaccine Act of 1813, a terrible mistake occurred.
Doctors said the mistake occurred because the fetuses had shifted positions after an ultrasound scan.
The first Steelers mistake occurred when Suggs stripped the ball from Roethlisberger.
Mr. Augenbraum declined to explain how the mistake occurred, saying that it was "an internal question".
