The generator matrix

 1  0  0  0  1  1  1  1  1  2  1  1  1  1  1  1  1  1  1 2a  0  1  1  1  1  2  1  1  1  1 2a  1  1  1  1  1  0  1  0  1  1  1 2a  1  2 2a+2  1  1 2a+2  2  1  1  1  1  1  1  1  2  0  1  1 2a+2  1 2a  1  1  1  1  1
 0  1  0  0  0  2  2 2a+3 2a+1  1 3a 3a+3 a+2 a+3  1 2a 2a+3 3a+3 2a  1  1 3a  2 a+2  a  1  a 2a+3 3a+3 2a+1 2a+2  a 2a+2  3 3a+1 2a+1  1 2a+1  1 a+2 2a+1 3a+2  1  0  1  1  0 3a+3  1  1 2a+3  1 2a+2  a 2a+1 a+3  a  1  1  2 2a+2  1  a  1 2a+2 3a 2a+2 2a+1 3a
 0  0  1  0  1 3a+2 a+1  a 2a+2 3a+2 2a+3 3a+1  a 3a+2 a+1  a  0  3  2 2a+1 2a+3 2a 2a+3 3a  0 a+2 3a+1  0  2 2a+3  1 a+3 3a+2  a 3a+2 3a+1 3a+3 a+1  2 a+1 a+2  1 a+1 3a+1 3a a+1 a+2  3 3a+2 3a+1 2a+2  3  2 2a+3 2a+2  1 3a+1  0 3a+1 a+3 a+2 2a  a 2a  1  0  2 2a  2
 0  0  0  1 3a+3  a  1  2 a+2 a+2  0  2 3a+1 2a+3 3a+2 3a+3  2 2a+2 3a a+2  1 2a+1 2a+3 2a a+1 2a  1  1 2a+1 3a+3 3a a+3 2a+3  a 2a+2 2a+3 a+2 a+3 2a+1 3a 2a+1 3a+1 2a  a a+3 2a+2  2  3  1 a+3 2a+2  2  3 3a 3a a+3 2a+2  1  1 3a+1  1 a+2 3a+2  a 2a+2 2a+1 a+3 3a+2 a+2
 0  0  0  0  2  0 2a  0  0  0  2 2a  2 2a 2a+2 2a+2  2  0 2a 2a 2a+2  0 2a+2 2a 2a+2  2  2  0 2a+2 2a+2  2 2a 2a+2 2a+2  0  0  2  2  2  2  2 2a  0 2a+2  2 2a+2  2  2 2a 2a 2a+2 2a 2a 2a 2a  0 2a  0  0  0  0 2a 2a 2a+2  0  0 2a+2  2  2

generates a code of length 69 over GR(16,4) who´s minimum homogenous weight is 187.

Homogenous weight enumerator: w(x)=1x^0+228x^187+912x^188+588x^189+1332x^190+1416x^191+3936x^192+1980x^193+3372x^194+2892x^195+7416x^196+4356x^197+5832x^198+5808x^199+12660x^200+6804x^201+9348x^202+8172x^203+18105x^204+9168x^205+12864x^206+10008x^207+22392x^208+11328x^209+12996x^210+10524x^211+19794x^212+9012x^213+9768x^214+6432x^215+12075x^216+4740x^217+4524x^218+2880x^219+4275x^220+1068x^221+1308x^222+720x^223+675x^224+108x^225+96x^226+72x^227+75x^228+42x^232+12x^236+24x^240+3x^244+3x^248

The gray image is a code over GF(4) with n=276, k=9 and d=187.
This code was found by Heurico 1.16 in 251 seconds.