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

generates a code of length 43 over Z49 who´s minimum homogenous weight is 238.

Homogenous weight enumerator: w(x)=1x^0+324x^238+492x^245+426x^252+14406x^258+330x^259+246x^266+180x^273+216x^280+114x^287+66x^294+6x^301

The gray image is a code over GF(7) with n=301, k=5 and d=238.
This code was found by Heurico 1.16 in 0.194 seconds.