The debut of the world’s tallest water slide has been delayed for a third time and there’s no word on when the Kansas City, Kansas, attraction will be ready for riders.

Schlitterbahn Waterpark says Verruckt will not open as scheduled on Sunday. The park’s news release, sent Thursday night, offers no explanation for the delay.

Problems with the conveyor system that hauls four-person rafts to the top of the 17-story slide forced park officials to cancel two media sneak preview days this week.

Guinness World Records certified Verruckt as the world’s tallest water slide in April.

The ride’s official opening date was moved from May 23 to June 5 for more testing, then was pushed back again to June 29.