The generator matrix

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

generates a code of length 10 over Z49 who´s minimum homogenous weight is 42.

Homogenous weight enumerator: w(x)=1x^0+84x^42+384x^49+2058x^54+504x^56+12348x^61+924x^63+504x^70

The gray image is a code over GF(7) with n=70, k=5 and d=42.
This code was found by Heurico 1.16 in 0.0218 seconds.