Package:<pari> Version: <2.5.0> Dear Sir, The command polredabs( y8 + 156*y6 + 12461*y4 + 433146*y2 + 5271616) returns "polredabs: bug in polredabs (missing vector), please report" in GP/PARI CALCULATOR Version 2.5.0 (released) amd64 running linux (x86-64/GMP kernel) 64-bit version compiled: Nov 17 2011, gcc-4.6.2 (Ubuntu/Linaro 4.6.2-2ubuntu1) (readline v6.2 enabled, extended help enabled) Sincerely yours, Y.Kitaoka