hit a snag, problem, etc
We didn't expect to hit a snag before the machine was ready for production.
But if we select the right flank and hit a snag, nothing will be achieved.
That process recently hit a snag, temporarily tipping the battle in favor of the debt problems, largely because Greece didn't have its own printing press with which to continue the game.
A police clampdown on car thieves hit a snag when villains stole one of their cars.
However, I hit a snag this time.