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  1  1  7  7  1  1 21 21  1 42  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  1  1  1 14  1 21  1  1  1  1  1  1  0 42  1  1  1  1  1  1  1  1  1  1  1  1 42
 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 20 46 46  1  1 32 32  1  1 11  1  7 21 43 22 22 43 38 10 26 40 12 40 44 37  0 35 31 17 20 27 21 35  7 45  2 41 17 27 16 29  4  1 46  1 29 37 41  1 11 38  1  1  2 45 43 48 11 21 44 45 18 20 35 36  1
 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 28  0 42 42 14  7 35 21 35 21 28 35 21  0  7 14 21  7  0 42 14 35  7 28  0 28 42 28 35 14 42  0 21 42  0 35 35 14 28 14 35  0 28  7  0  7 28 21 42 35 21 42 14 42  7 28 14 42 14  0 35 21 42  7 14  7

generates a code of length 91 over Z49 who´s minimum homogenous weight is 537.

Homogenous weight enumerator: w(x)=1x^0+4368x^537+972x^539+4830x^544+456x^546+1932x^551+954x^553+3276x^558+12x^581+6x^588

The gray image is a code over GF(7) with n=637, k=5 and d=537.
This code was found by Heurico 1.16 in 0.273 seconds.