The generator matrix

 1  0  1  1  1  1  1  1  1  1  1  0  1  1  1  1  1  1  1  1  1  1  1  1  1  1  7  1  7  1  1  1  1  1  1  1 42  1  1  1  1  1  1  1  1  1  1 21 21  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  7  1  1 42  1  1  1  1  1  1  1 21  1  1
 0  1  1 31 16 48  4 19  0 36 31  1 16 19 48  4 36  7 38 26  9  9  6  6 44 46  1 46  1 20 32 32  7 21 38 45  1 43 43 26 33 21 42 22 22 45 33  1  1 11 44 37 23 37 23 20 27 16 23 13 48 27 13 20 37 31 19 38 47 24 14 36  4  1 26 21  1 43 32 12 11 29  3 14  1 29  0
 0  0 35 21 42  7 14 21  7 28 14  7 35  0  0 28 42 14 42 28  7 21 35 21 14  0 14 42 42 28  7 35 42 21 28  7 28 21  0 35 14 35 28 14  7  0 42 21 35 21 28  0  7 14 21 14 42 28 42  7 28 14  0 42 35 35  7  0  0  7 28 14  0 35 14  7 21 28 14 42 42 42 35 35  0 35 21

generates a code of length 87 over Z49 who´s minimum homogenous weight is 511.

Homogenous weight enumerator: w(x)=1x^0+1170x^511+924x^512+588x^513+756x^514+3822x^518+1512x^519+798x^520+756x^521+1098x^525+672x^526+168x^527+42x^528+2430x^532+1008x^533+504x^534+504x^535+36x^539+12x^546+6x^553

The gray image is a code over GF(7) with n=609, k=5 and d=511.
This code was found by Heurico 1.16 in 0.25 seconds.