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  X  1
 0  X  0  0  0  X  X  X a*X a^3*X  0  X a*X a^6*X a^5*X 2*X a^6*X 2*X a^7*X a^5*X a*X a^7*X  X  0
 0  0  X  0  0 a^7*X a^6*X a*X 2*X a^7*X  X a^7*X a*X a^2*X  X a^7*X  X a^2*X 2*X a*X a^7*X a*X  0  0
 0  0  0  X  0 a^7*X  X a^2*X a^2*X a^6*X a^3*X a^6*X a^3*X a^5*X  X  X a^5*X  X a^2*X a^2*X a^3*X 2*X a^6*X 2*X
 0  0  0  0  X a^6*X 2*X a^3*X  X  X a*X a*X  X a^2*X  0 2*X a^5*X a*X  X  0 a^3*X a^3*X a^6*X  X

generates a code of length 24 over F9[X]/(X^2) who´s minimum homogenous weight is 153.

Homogenous weight enumerator: w(x)=1x^0+456x^153+2640x^162+4784x^171+8048x^180+52488x^184+13128x^189+419904x^193+16240x^198+10432x^207+3320x^216

The gray image is a linear code over GF(9) with n=216, k=6 and d=153.
This code was found by Heurico 1.16 in 29.7 seconds.