Takeoff was slated for Wednesday evening from Kennedy Space Center in Florida, but the company waived off the launch attempt because of an issue with the launchpad’s ground system. The problem stemmed from a hydraulics system used to control one of two clamps that hold on to the upper portion of the rocket as it sits vertically on the ground pad before launch.

NASA and SpaceX on Wednesday night scrubbed the Falcon 9 launch of a flight intended to retrieve from the International Space Station astronauts Suni Williams and Butch Wilmore, who have spent nine months in orbit.

With favorable weather forecast at Kennedy Space Center’s Launch Complex 39A, NASA’s SpaceX Crew-10 mission is set to launch at 7:49PM ET tonight. Flying into orbit atop a SpaceX Falcon 9 rocket, the Dragon spacecraft, will dock with the ISS at around 6:00AM ET on March 13th.