We present preliminary results of study of the &eegr;&pgr;−, &eegr;′&pgr;−andb1&pgr;‐systems produced in the &pgr;−Be‐interaction at 28GeV/c.JPC= 2++and 1−+‐waves resulted from the PWA have been fitted in each system separately to establish the nature of the 1−+‐wave. A hypothesis of the 1−+‐wave resonant nature in the &eegr;&pgr;−and &eegr;′&pgr;−has no statistically significant preference over the non‐resonant one. Theb1&pgr;‐system analysis confirms the results of the 37GeV/c‐beam data analysis in favor of the resonant treatment of the bump at 1.6GeV. © 2002 American Institute of Physics