The generator matrix

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

generates a code of length 15 over Z49 who´s minimum homogenous weight is 63.

Homogenous weight enumerator: w(x)=1x^0+138x^63+918x^70+1656x^77+17682x^84+91332x^91+4338x^98+1584x^105

The gray image is a code over GF(7) with n=105, k=6 and d=63.
This code was found by Heurico 1.16 in 1.91 seconds.