The generator matrix

 1  1  1  1  1  1  1  1  X
 0  X  0  0  X  X a*X a^4*X  X
 0  0  X  0 a^6*X a^5*X a^3*X  X a^4*X
 0  0  0  X  X a^4*X  X a^2*X a^2*X

generates a code of length 9 over F8[X]/(X^2) who´s minimum homogenous weight is 48.

Homogenous weight enumerator: w(x)=1x^0+588x^48+4088x^56+26915x^64+1176x^72

The gray image is a linear code over GF(8) with n=72, k=5 and d=48.
This code was found by Heurico 1.16 in 0.0281 seconds.