The generator matrix

 1  0  1  1  1  1  1  1  1  1  1  1  1  1  1  0  1  1  1  1  1  0  1  7  1  1  1 21  7  1  1  1  1  1  1 21  1  1  1  1  1  1  1  1  7  1
 0  1  1 31 16 48  4 19  0 36 31 16 48  4 19  1 19 16 36 48 26  1  4  1 40 33  0  1  1 31 46  9  7 38 36  1  9 11 18 15  6 44 18 41  1  0
 0  0 35  0 35  7 35  7 42 14  7 42  0  0 42 14 21 28 21 14 28  7  7 28  7 28 14 42  7 14 28 14 35  0  0 21 35 35 42  0 14 28 42 42 42  0
 0  0  0  7 28 28 21 42  0 42  7 42 35 28 21 21 42 21 35 35 35 21  0 28 35 14 35 28 35 28  7  7  7 42  0 28 35  0 28 28  7  0  0 28 42  7

generates a code of length 46 over Z49 who´s minimum homogenous weight is 252.

Homogenous weight enumerator: w(x)=1x^0+102x^252+42x^253+42x^255+168x^256+594x^259+1092x^260+1554x^261+1176x^262+1470x^263+1728x^266+5292x^267+4158x^268+2394x^269+2814x^270+5586x^273+16842x^274+11718x^275+5922x^276+5754x^277+8088x^280+19950x^281+11382x^282+4872x^283+4200x^284+216x^287+204x^294+162x^301+72x^308+54x^315

The gray image is a code over GF(7) with n=322, k=6 and d=252.
This code was found by Heurico 1.16 in 4.03 seconds.