Software issue forces Russia to delay Proton launch until next year
Because of a software issue detected once the rocket was arrived in Baikonur, Russia has been forced to delay one of its last Proton launches from next week until next year, with the new launch date undetermined.
[O]n Dec. 13, 2025, final checks revealed a problem in the Block DM-03 upper stage which forced to postpone the launch, Roskosmos announced. According to the Zakryty Kosmos Telegram channel, a software issue will require the return of the rocket back to the processing building and the disassembly of the payload section. The potential need to ship the onboard avionics back to the manufacturer would likely push the mission well into 2026.
Proton has largely been retired, though it appears it has some undetermined number of military and government launches left on its manifest. In 2023 there were discussions to restart its assembly line, but nothing since has been announced.
Because of a software issue detected once the rocket was arrived in Baikonur, Russia has been forced to delay one of its last Proton launches from next week until next year, with the new launch date undetermined.
[O]n Dec. 13, 2025, final checks revealed a problem in the Block DM-03 upper stage which forced to postpone the launch, Roskosmos announced. According to the Zakryty Kosmos Telegram channel, a software issue will require the return of the rocket back to the processing building and the disassembly of the payload section. The potential need to ship the onboard avionics back to the manufacturer would likely push the mission well into 2026.
Proton has largely been retired, though it appears it has some undetermined number of military and government launches left on its manifest. In 2023 there were discussions to restart its assembly line, but nothing since has been announced.
