The generator matrix

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

generates a code of length 37 over Z7[X]/(X^2) who´s minimum homogenous weight is 210.

Homogenous weight enumerator: w(x)=1x^0+24x^210+126x^217+2058x^222+150x^224+24x^231+6x^252+12x^259

The gray image is a linear code over GF(7) with n=259, k=4 and d=210.
This code was found by Heurico 1.16 in 0.0082 seconds.