The generator matrix

 1  1  1  1  1  1  1  1  2  2
 0  2  0  0  0  0  0  6  4  4
 0  0  2  0  0  0  0  6  2  2
 0  0  0  2  0  0  0  6  2  6
 0  0  0  0  2  0  2  0  0  4
 0  0  0  0  0  2  2  0  2  2
 0  0  0  0  0  0  4  0  4  0
 0  0  0  0  0  0  0  4  0  4

generates a code of length 10 over Z8 who´s minimum homogenous weight is 4.

Homogenous weight enumerator: w(x)=1x^0+188x^4+1128x^6+6054x^8+18040x^10+6012x^12+1176x^14+161x^16+8x^18

The gray image is a code over GF(2) with n=40, k=15 and d=8.
This code was found by Heurico 1.16 in 0.798 seconds.