A failure on a backup computer could lead to a SpaceX and NASA launch being cancelled on Monday. A decision will be made Sunday.
The launch is set for Monday, but a backup computer on a system designed to help safe docking on the International Space Station wasn't working and could mean the launch gets scrapped, reports the Los Angeles Times. This would be just the latest delay to plague the SpaceX unmanned Falcon 9 rocket's launch.
The launch was previously delayed because of an Air Force radar tracking system problem that has since been remedied.
The problem is with the Canadarm2 robotic arm that is meant to capture and securely hold the rocket to the ISS. Engineers are trying to figure out if there is "enough redundancy" for the arm to work, even if the backup computer isn't.
If it's determined there isn't enough redundancy built into the system, then it would likely mean that a spacewalk would be required, according to NBC News.
It's possible the launch could go ahead as planned and schedule the spacewalk and repair to the backup computer, known as a multiplexer-demultiplexer, before it is scheduled to reach the ISS, which isn't until Wednesday.