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

generates a code of length 45 over Z49 who´s minimum homogenous weight is 238.

Homogenous weight enumerator: w(x)=1x^0+660x^238+1194x^245+1782x^252+2142x^259+14406x^264+2160x^266+86436x^271+2466x^273+2514x^280+2154x^287+1212x^294+372x^301+144x^308+6x^315

The gray image is a code over GF(7) with n=315, k=6 and d=238.
This code was found by Heurico 1.16 in 9.62 seconds.