"H3. Not implemented" will be issued in the case of a RHS with bi-axial load when minor axis moment exceeds 2% of Mcy, and subject to high shear such that section H.3 checks are required (see Web Shear Interaction above). These H.3 checks are only performed in the case of uni-axial loaded RHS.

"Lambda Critical Error": Displayed if there is an error evaluating a specific load combination to determine λcr. This is a result of the load combination being evaluating not containing any notional load cases (only notional load cases are used to determine λcr). Confirm that notional load cases have been created in the analysis mode and have been analyzed.

"Per 2.4.2.7 P-Delta Analysis is recommended": This indicates that due to a large sway the BS5950:2000 2.4.2.7 mandates that a second order analysis be performed, which is not currently the case. This will only show as a warning following a Design-All if all the following are true:

• For at least one member axis the sway state is designated to be calculated per load combination.
• For such a member the λcr calculated is less than 4.0.
• P-Delta was not selected for the analysis.