The generator matrix

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

generates a code of length 9 over Z49 who´s minimum homogenous weight is 28.

Homogenous weight enumerator: w(x)=1x^0+210x^28+588x^35+1638x^42+3828x^49+100842x^54+5628x^56+4914x^63

The gray image is a code over GF(7) with n=63, k=6 and d=28.
This code was found by Heurico 1.16 in 0.391 seconds.