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

generates a code of length 59 over Z49 who´s minimum homogenous weight is 315.

Homogenous weight enumerator: w(x)=1x^0+204x^315+954x^322+1434x^329+2034x^336+7122x^343+33792x^350+65466x^357+2166x^364+1860x^371+1404x^378+786x^385+306x^392+114x^399+6x^406

The gray image is a code over GF(7) with n=413, k=6 and d=315.
This code was found by Heurico 1.16 in 13.1 seconds.