The generator matrix

 1  0  1  1  1  1  1  1  1  1  1  1  1  1  1  1  0  1  1  1  1  7  1  1  1  1  1  1  1  1  1  7  7  1  1  1 42  1  1  1
 0  1  1 31 16 48  4 19  0  7  7 14 14 19 31 48  1 36  4 16 38  1 46 40 43  6  9  6 29 23 38  1  7 46 26  8  1 24 26 15
 0  0 35 21 42  7 14 21  7 28 14 35 42  0 14 21 14  7 21  0 35 21  7 28 42 35 14 42  0 28  7 28 35 28 14 21 35 28 35 28

generates a code of length 40 over Z49 who´s minimum homogenous weight is 231.

Homogenous weight enumerator: w(x)=1x^0+1314x^231+1890x^232+1764x^233+2058x^238+1512x^239+588x^240+3126x^245+2772x^246+1764x^247+6x^266+12x^273

The gray image is a code over GF(7) with n=280, k=5 and d=231.
This code was found by Heurico 1.16 in 57.6 seconds.