[en] Spin correlation parameters A_LL, A_SL,A_NL, A_NO, A_SO, A_LO, andA_OL have been measured for pp→npπ⁺ at 492, 576, 643, 729, and 796 MeV over a large part of phase space, using a longitudinally polarized target and a polarized beam. Results rule out broad dibaryons in this mass range in NN ³P₂ and ³F₃; in ¹D₂ some phase variation is observed, resembling that expected of a strong inelastic threshold