The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  2  2  2  1  1  1  2  2  2  1  1  2  4  4  4  0  0  0  2  2  2  2  1  2  4  1  1
 0  4  0  4  0  0  4  4  0  0  4  4  0  0  4  0  4  4  4  0  0  4  4  0  4  4  0  0  4  4  4  4  0  0  0  4  4  0  0  0  0  4
 0  0  4  4  0  4  4  0  0  4  4  0  0  4  4  4  4  0  0  0  4  4  0  4  4  0  0  4  4  0  0  4  4  0  4  4  0  0  0  0  4  4

generates a code of length 42 over Z8 who´s minimum homogenous weight is 42.

Homogenous weight enumerator: w(x)=1x^0+3x^42+22x^43+3x^44+1x^46+2x^47

The gray image is a code over GF(2) with n=168, k=5 and d=84.
This code was found by Heurico 1.16 in 0.0143 seconds.