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  3  1  1  1  1  1  3  1  3  1  1  1  3  1  1  3  1  1
 0  3  0  0  0  0  0  0  0  0  0  0  0  0  6  3  6  3  6  3  6  3  6  0  3  0  0  6  3  3  3  0  6  3  3  6  3  6  0  3  3  3  6  3  0  0
 0  0  3  0  0  0  0  0  0  0  0  3  3  3  6  6  0  3  0  6  3  0  0  3  6  0  3  6  3  6  3  3  0  3  3  6  3  0  6  0  0  3  0  6  3  0
 0  0  0  3  0  0  0  0  0  3  3  6  6  6  0  6  0  3  3  3  3  6  6  0  0  0  0  6  6  3  3  3  3  6  0  0  0  3  0  0  3  3  3  3  0  0
 0  0  0  0  3  0  0  0  3  6  6  6  3  3  6  6  3  6  0  6  0  6  3  6  3  3  0  3  0  0  3  0  3  3  6  3  0  3  6  3  0  6  0  6  3  0
 0  0  0  0  0  3  0  0  6  6  3  3  0  6  0  3  3  0  3  0  0  6  6  0  3  3  0  6  3  6  3  6  3  6  3  0  6  6  6  3  3  0  6  6  3  0
 0  0  0  0  0  0  3  0  6  3  6  3  6  0  0  0  0  3  6  6  0  0  6  3  3  3  6  3  3  3  3  3  6  3  6  6  0  3  0  3  6  6  6  0  6  0
 0  0  0  0  0  0  0  3  3  0  3  0  3  0  6  6  6  6  6  0  3  0  0  6  6  3  6  0  6  6  0  0  3  0  0  6  3  3  3  0  3  3  0  3  3  6

generates a code of length 46 over Z9 who´s minimum homogenous weight is 72.

Homogenous weight enumerator: w(x)=1x^0+100x^72+262x^75+370x^78+446x^81+54x^82+574x^84+540x^85+680x^87+2160x^88+652x^90+4320x^91+762x^93+4320x^94+714x^96+1728x^97+686x^99+514x^102+400x^105+236x^108+100x^111+48x^114+10x^117+2x^120+2x^123+2x^126

The gray image is a code over GF(3) with n=138, k=9 and d=72.
This code was found by Heurico 1.16 in 7.14 seconds.