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

generates a code of length 46 over Z49 who´s minimum homogenous weight is 238.

Homogenous weight enumerator: w(x)=1x^0+72x^238+756x^245+1344x^252+1764x^259+2058x^264+1992x^266+24696x^271+2382x^273+74088x^278+2640x^280+2280x^287+1986x^294+1020x^301+480x^308+90x^315

The gray image is a code over GF(7) with n=322, k=6 and d=238.
This code was found by Heurico 1.16 in 9.74 seconds.