The generator matrix

 1  0  0  0  0  1  1  1  4  1  1  2  1  1  0  1  0  2  6  1  6  1  1  2  1  1  6  1  6  6  1  4  1  0  2  1  1  2  1  1  1  2  6  1  1  4  6  0  4  4  2  1  1  4
 0  1  0  0  0  0  0  0  0  4  4  4  4  4  4  4  0  4  0  1  1  3  5  1  5  3  1  7  1  2  6  1  3  6  1  2  2  6  3  5  2  1  6  5  3  1  1  1  2  1  2  7  2  6
 0  0  1  0  0  1  4  5  1  0  1  1  2  7  1  7  6  1  6  6  3  3  5  1  4  4  3  3  5  1  1  7  6  4  6  2  0  4  2  4  2  3  0  6  7  0  2  1  1  4  6  7  1  4
 0  0  0  1  0  1  5  2  5  3  7  0  2  4  7  6  1  6  1  3  6  4  0  5  2  2  1  3  6  3  1  3  7  1  2  3  6  6  5  3  5  4  0  4  5  2  0  3  7  7  1  7  0  0
 0  0  0  0  1  4  1  5  5  2  3  1  7  6  6  0  5  7  3  6  4  7  2  4  7  0  1  0  5  2  3  5  7  4  7  1  0  1  0  3  2  6  1  0  5  4  0  6  7  3  6  2  2  1

generates a code of length 54 over Z8 who´s minimum homogenous weight is 46.

Homogenous weight enumerator: w(x)=1x^0+390x^46+628x^47+1411x^48+1360x^49+2504x^50+2088x^51+3520x^52+2440x^53+3934x^54+2768x^55+3459x^56+2228x^57+2484x^58+1224x^59+1261x^60+448x^61+362x^62+108x^63+101x^64+20x^65+20x^66+7x^68+2x^70

The gray image is a code over GF(2) with n=216, k=15 and d=92.
This code was found by Heurico 1.11 in 31.5 seconds.