The generator matrix

 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  1  1  1  7  1  1  1  1  1  1  1  1  1
 0  7  0  0  0  7  7 28  0 21  7 42 14 42  0 35 28 14  7  7 28 21 35 21 14  0 21  0 21  7  7  7  7 35 21  0 14  7 35  0
 0  0  7  0  0 35 28 35  7 28 35 35  7  7  7 21 21 28  7  0 42 35  7  0  0 35 28 14  7 42 28 35 35  7  0 28 35 21  7  0
 0  0  0  7  0 35 21 21 35 35  7 42  0 14 42 14 21  7 21 21 14 35  7 28 14 21 42  7 42 42  0 35 21 35  7 28 21  7 28  0
 0  0  0  0  7 35 42  7 42  7  7  0 14  7  7 28 42 28  0 21 35 28 28  0 28  7 42 14 42  7 14 42 42 42 28  7  0  7 42  0

generates a code of length 40 over Z49 who´s minimum homogenous weight is 203.

Homogenous weight enumerator: w(x)=1x^0+144x^203+732x^210+1374x^217+1698x^224+2028x^231+14406x^234+2724x^238+86436x^241+2562x^245+2622x^252+1740x^259+930x^266+228x^273+24x^280

The gray image is a code over GF(7) with n=280, k=6 and d=203.
This code was found by Heurico 1.16 in 7.97 seconds.