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

generates a code of length 44 over Z49 who´s minimum homogenous weight is 231.

Homogenous weight enumerator: w(x)=1x^0+384x^231+1290x^238+1734x^245+4056x^252+26796x^259+76662x^266+2532x^273+2232x^280+1368x^287+468x^294+114x^301+12x^308

The gray image is a code over GF(7) with n=308, k=6 and d=231.
This code was found by Heurico 1.16 in 9.37 seconds.