The generator matrix

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

generates a code of length 17 over F9[X]/(X^2) who´s minimum homogenous weight is 99.

Homogenous weight enumerator: w(x)=1x^0+344x^99+2032x^108+4296x^117+10016x^126+17704x^135+472392x^136+16656x^144+8000x^153

The gray image is a linear code over GF(9) with n=153, k=6 and d=99.
This code was found by Heurico 1.16 in 17 seconds.