The generator matrix

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

generates a code of length 36 over Z7[X]/(X^2) who´s minimum homogenous weight is 196.

Homogenous weight enumerator: w(x)=1x^0+594x^196+168x^198+336x^199+3600x^203+3024x^205+2520x^206+5508x^210+18144x^212+10416x^213+12444x^217+36288x^219+15540x^220+8508x^224+252x^231+192x^238+96x^245+18x^252

The gray image is a linear code over GF(7) with n=252, k=6 and d=196.
This code was found by Heurico 1.16 in 2.8 seconds.