The generator matrix

 1  1  1  1  1  1  1  1  1
 0  X  0  X 3X 3X  0  X 3X
 0  0  X 5X 3X 2X 4X 2X  0

generates a code of length 9 over Z7[X]/(X^2) 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 linear code over GF(7) with n=63, k=4 and d=42.
This code was found by Heurico 1.16 in 0.000699 seconds.