CLV Problems?
NASA Encounters Possible Problems With Crew Launch Vehicle Design, SpaceRef
“According to industry sources, NASA has encountered some problems with its planned CLV (Crew Launch Vehicle) design as spelled out in the yet to be (formally) released Exploration Systems Architecture Study (ESAS) Final Report. NASA has considered bringing in contractor representatives soon to discuss this issue since a change in the CLV design would lead to other delays – including the CEV.”