I understand now. Bs.net says it spans 2 full shows
"The first-ever soundboard recordings to surface from the ‘77 tour offer a trove of significant performances spanning two full shows from this under-documented transitional era, including early prototypes of “Something In The Night,” “Rendezvous” and “The Promise”; the unreleased original “Action In The Streets” featuring the Miami Horns; and a mesmerizing expanded version of “Backstreets.”
not just 45 mins then