Gloucestershire's new-ball pair of Jon Lewis and Steve Kirby sealed their side's place in the semi-finals of the Friends Provident Trophy with seven wickets between them, as Nottinghamshire's campaign hit the buffers at Bristol.
In a quarter-final clash that had to be delayed because of the ODI between England and West Indies at Nevil Road last month, Nottinghamshire won the toss and chose to bat first, but were immediately made to regret that decision as they were reduced to 9 for 3.
Kirby made the initial incisions, removing both Ali Brown and Alex Hales for ducks, before Lewis removed Mark Wagh for 3. Only the captain, Chris Read, provided any lasting resistance with 57 from 78 balls, but he was one of four victims for Lewis, who finished with 4 for 34.
Chasing a modest 190 for victory, Gloucestershire stumbled briefly to 68 for 3, but an unbeaten half-century from Craig Spearman sealed a six-wicket victory with more than 12 overs to spare.
Gloucester now meet Sussex at Hove in the semi-final on July 5.