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

generates a code of length 37 over Z49 who´s minimum homogenous weight is 189.

Homogenous weight enumerator: w(x)=1x^0+282x^189+1026x^196+1692x^203+1962x^210+2346x^217+100842x^222+2880x^224+2952x^231+2280x^238+1026x^245+300x^252+60x^259

The gray image is a code over GF(7) with n=259, k=6 and d=189.
This code was found by Heurico 1.16 in 7.35 seconds.