The generator matrix

 1  0  0  1  1  1  1  1 35  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1 21 14 28  1
 0  1  0 36 31 16 35 17  1 48  1  9 34 18 19 28 29 44 25 38  4 26 46 13  5 20 45 14 30 12  8 24 37 14 22 11  1  1  1  0
 0  0  1  5 31 34 36  4 16 38  2 21 46 37 40 30 48 10 39 33 29 35 27 41 44  7 13 12  1 46  8 37 47  4 28 45 38 29 32 24

generates a code of length 40 over Z49 who´s minimum homogenous weight is 225.

Homogenous weight enumerator: w(x)=1x^0+1890x^225+882x^226+756x^230+5082x^231+15120x^232+3528x^233+294x^234+2016x^237+7758x^238+22302x^239+6762x^240+1764x^241+3402x^244+12168x^245+28602x^246+5292x^247+18x^252+6x^273+6x^280

The gray image is a code over GF(7) with n=280, k=6 and d=225.
This code was found by Heurico 1.16 in 2.82 seconds.