The generator matrix

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

generates a code of length 13 over Z49 who´s minimum homogenous weight is 63.

Homogenous weight enumerator: w(x)=1x^0+318x^63+444x^70+504x^77+14406x^78+834x^84+300x^91

The gray image is a code over GF(7) with n=91, k=5 and d=63.
This code was found by Heurico 1.16 in 0.0389 seconds.