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

generates a code of length 43 over Z49 who´s minimum homogenous weight is 224.

Homogenous weight enumerator: w(x)=1x^0+282x^224+1128x^231+1668x^238+1854x^245+2058x^246+2178x^252+24696x^253+2712x^259+74088x^260+2610x^266+2226x^273+1362x^280+636x^287+144x^294+6x^301

The gray image is a code over GF(7) with n=301, k=6 and d=224.
This code was found by Heurico 1.16 in 9.05 seconds.