As Command Module Pilot for Apollo 9, Scott’s responsibilities were heavy. The Lunar Module was to separate from the Command and Service Module during the mission; if it failed to return, Scott would have to run the entire spacecraft for reentry, normally a three-man job.
When Scott tried to release the lunar module, he did not hold the button long enough so the lander got hung on the capture latches.
Steve Bales (Guido) made a new entry to the trajectory and guidance section of the rules book which excluded lunar module computer program alarms 1201 and 1202 from the abort list.
Crew training for Apollo 11 was already complicated by the need to master the controls of two different and very complex spacecrafts, as well as the space suit, but now the mission took on new dimensions, principally in learning how to set a 14.5-metric-ton lunar module safely down on the moon.