Dnepr's inaugural launch came in April 1999 and put a British payload into space.
Pressure is necessary to push propellants into the combustion chambers.
Kosmotras, the Russian-Ukrainian company that markets the Dnepr 1, decided to replace the entire rocket rather then fix the one that failed. During the Cold War, the missile was considered the most powerful weapon in the Soviet nuclear arsenal. On Tuesday, Kosmotras representatives said the replacement rocket for the September launch was en route to Baikonur via rail from an unidentified strategic missile base in Russia. It will arrive at the launch facility in a few days. Following the scrub last month, launch teams in Baikonur first unloaded the rocket's propellants, then undocked the payload module holding the five satellites and returned the unit to a processing building at Baikonur.