The generator matrix

 1  0  1  1  1  1  1 X+6  1  1  1 2X  1  1  1  1  0  1  1 2X  1  1  1 X+6  1  1  1  1  1  1  1  1  1  3 X+3 2X+3  1  1  1  1  1  1  3 X+3  1  1  1 2X+3  1  1  1 X+3  1  1  1  1  1  1  1  1  1  1  1  1  3 2X+6  6  1  0 X+6  1
 0  1 2X+7  8 X+1 X+6 X+5  1 2X  7 2X+8  1  0 2X+7  8 2X  1 X+1 X+5  1 X+6  7 2X+8  1  3 X+3 2X+4 X+4 2X+3  4  2 X+2 2X+2  1  1  1  3 X+3 2X+4 X+4  2 X+2  1  1 2X+3  4 2X+2  1 X+2  3 X+4  1  0 X+6 2X X+3 X+1 2X+7 2X+4  7 2X+3  4  2 X+5  1  1  X  8  1  1  5
 0  0  6  0  3  6  3  3  3  0  6  6  3  3  6  6  3  0  0  0  0  6  3  6  6  3  0  6  0  3  3  6  0  6  0  3  3  0  3  0  0  3  3  6  3  0  3  6  0  0  3  3  6  3  0  6  6  0  6  3  6  6  6  6  0  0  3  3  6  0  0

generates a code of length 71 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 139.

Homogenous weight enumerator: w(x)=1x^0+342x^139+378x^140+8x^141+870x^142+288x^143+8x^144+42x^145+54x^146+2x^147+150x^148+36x^149+4x^156+4x^159

The gray image is a code over GF(3) with n=639, k=7 and d=417.
This code was found by Heurico 1.16 in 0.173 seconds.