We show that A2(7,4)≤388 and, more generally, Aq(7,4)≤(q2−q+1)[7]q+q4−2q3+3q2−4q+4 by semidefinite programming for q≤101. Furthermore, we extend results by Bachoc et al. on SDP bounds for
A2(n,d), where d is odd and n is small, to Aq(n,d) for small q and
small n