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  1  1  1  1  1  1  1  1  1  1  1  1  1  X  1  1  1  1  1  1  1  1  1  1  3  1  X  X  1  1  X  X  1  1  1  0  X  X
 0  X  0  0  0 2X X+3 2X+3  X 2X+3  3  3 X+3 2X+3 2X X+3 X+3 X+3 2X+3 X+6  0 X+6 2X 2X+3 2X+6  3  3 2X+3 2X+6 X+3 2X+3 2X+6  0  X X+6 X+6  6 2X+3  X X+3  0 2X 2X+3  X  0 2X  3  3  X  3  6  6  X  X  3 2X 2X+3 X+3  3  0  0  X 2X X+3 2X 2X+3 2X+6 2X+6 X+3  X X+6  0  X 2X+3 2X
 0  0  X  0  6  3  6  3  0  0 X+3 2X+6 2X+6 2X+3 X+6  X 2X  X 2X+6  X 2X+6 2X+6 X+3 X+3 2X 2X+6 X+6 2X X+6 2X  6 X+6 X+6 X+3 2X+6 2X+3  X 2X+3  3  6 2X+3  0  0 X+3 2X+6 2X  3  3 X+6 2X+3 2X+3 X+6  6  X X+3  X 2X+3 X+3 2X+3 X+6  3 X+3 X+3 2X  0 2X+6  6  3  6  0  0 X+3 X+3 2X+6 2X
 0  0  0  X 2X+3  0 2X X+6  X 2X 2X+3  6  3  0  6 X+6 X+6  3 2X+6 2X 2X 2X+6 2X X+6 X+6 X+3 X+3 2X+3 2X+3 2X  X  3 2X+3 X+6 X+6  3  X  3 X+3  6 X+3 2X+6 X+6  0  3  X 2X  6  6 2X 2X+3 2X 2X+6 X+3  0  X 2X+3 2X X+6  X X+3  0  3 2X+6  0  0  0  6 2X  6  X  6 X+3 X+6  6

generates a code of length 75 over Z9[X]/(X^2+3,3X) who´s minimum homogenous weight is 140.

Homogenous weight enumerator: w(x)=1x^0+366x^140+300x^141+18x^142+762x^143+614x^144+234x^145+1320x^146+1496x^147+864x^148+2478x^149+3162x^150+1386x^151+2466x^152+1786x^153+414x^154+540x^155+344x^156+312x^158+168x^159+264x^161+90x^162+138x^164+32x^165+84x^167+24x^168+18x^170+2x^198

The gray image is a code over GF(3) with n=675, k=9 and d=420.
This code was found by Heurico 1.16 in 16.5 seconds.