出问题；出岔子
If plans go adrift, they fail or do not produce the correct results.
Something seems to have gone adrift in our calculations. 我们的计算好像有什么地方出了问题。
After his divorce, his life went adrift for a while.
They expected too much of their supporters and that's where it went adrift.
A recent attempt to set up her own business had gone adrift.
See also: adrift