The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
 0  X  0  X 3X 3X  0  X 3X 2X 2X 2X  0  X 3X 2X 6X 6X 6X
 0  0  X 5X 3X 2X 4X 2X  X 5X  X 4X 5X 4X  0 2X  0  X 3X

generates a code of length 19 over Z7[X]/(X^2) who´s minimum homogenous weight is 105.

Homogenous weight enumerator: w(x)=1x^0+90x^105+144x^112+2058x^114+54x^119+12x^126+42x^133

The gray image is a linear code over GF(7) with n=133, k=4 and d=105.
This code was found by Heurico 1.16 in 0.0023 seconds.