The generator matrix

 1  0  0  1  1
 0  1  0 a^7*X+1  a
 0  0  1 a^7*X+a^7  a

generates a code of length 5 over F9[X]/(X^2) who´s minimum homogenous weight is 24.

Homogenous weight enumerator: w(x)=1x^0+720x^24+80x^27+19440x^32+11520x^33+240x^36+297432x^40+155520x^41+46080x^42+408x^45

The gray image is a linear code over GF(9) with n=45, k=6 and d=24.
This code was found by Heurico 1.16 in 0.478 seconds.