Step 4 — Solve, POST1, and CSV
CMSEL,S,bottom_nodes / D,ALL,ALL,0
CMSEL,S,top_nodes
D,ALL,UY,disp / D,ALL,UX,0 / D,ALL,UZ,0
AUTOTS,OFF / KBC,0 / NSUBST,10 / SOLVEIn POST1, sum RFY at the lower support. Write m11_contact_audit.csv with contact_closed, force_error, and n_converged. Measured reference: rfy_close ≈ 5.65 MN, study_passes = 1.