The generator matrix

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

generates a code of length 8 over F9[X]/(X^2) who´s minimum homogenous weight is 54.

Homogenous weight enumerator: w(x)=1x^0+224x^54+192x^63+5832x^64+312x^72

The gray image is a linear code over GF(9) with n=72, k=4 and d=54.
This code was found by Heurico 1.16 in 0.000944 seconds.