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  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  X  1  1  1  1  X  1  1
 0  X  0  0  0  0  0  0  0  X  X  X  X  0  0  0  0  X  X  0  0  X  X  0  X  X  0  0  X  0  0  0  0  0  0  X  X  X  X  X  X  0  X  X  X
 0  0  X  0  0  0  0  0  X  X  X  0  X  0  X  0  X  X  0  0  0  0  0  X  X  0  0  X  X  0  X  X  0  X  X  X  X  X  0  0  0  0  X  X  0
 0  0  0  X  0  0  0  0  X  0  X  X  X  0  0  X  X  0  0  0  X  X  0  X  0  0  X  X  0  0  X  X  X  0  0  0  0  X  X  0  X  X  0  X  0
 0  0  0  0  X  0  0  0  X  X  0  X  0  X  0  X  0  0  X  X  X  0  0  0  X  X  0  0  X  X  0  X  X  X  0  0  0  0  X  X  X  0  0  X  0
 0  0  0  0  0  X  0  X  0  0  X  X  0  X  0  0  X  0  X  X  X  0  0  X  X  0  X  0  0  0  0  0  X  X  X  0  X  X  X  0  0  X  0  0  X
 0  0  0  0  0  0  X  X  0  0  0  X  X  0  X  0  X  X  0  X  0  0  X  0  0  X  0  X  X  X  0  X  X  X  0  0  0  X  0  0  X  X  0  X  X

generates a code of length 45 over Z2[X]/(X^2) who´s minimum homogenous weight is 40.

Homogenous weight enumerator: w(x)=1x^0+21x^40+29x^42+32x^43+19x^44+64x^45+21x^46+32x^47+14x^48+7x^50+9x^52+6x^54+1x^86

The gray image is a linear code over GF(2) with n=90, k=8 and d=40.
This code was found by Heurico 1.16 in 0.016 seconds.