The generator matrix

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

generates a code of length 9 over Z49 who´s minimum homogenous weight is 42.

Homogenous weight enumerator: w(x)=1x^0+30x^42+126x^49+2058x^54+90x^56+96x^63

The gray image is a code over GF(7) with n=63, k=4 and d=42.
This code was found by Heurico 1.16 in 0.000692 seconds.