We're standing down from today's #Starliner Orbital Flight Test-2 launch.

Boeing still has not successfully completed the 2019 demo flight (Boe-OFT).

Boeing wanted to launch several days ago, but a glitch in the station’s new Russian module prevented that, and now there’s another fuel system issue. 

It is possible Boeing will be able to schedule a new launch for tomorrow (August 4th), indicating the problem relates to instrumentation rather than a real problem with the hardware

Boeing will have to complete a crewed demo after this, once the Starliner can successfully launch atop its Atlas V rocket, dock at the station, and then return to Earth