Hi Sylvain.
Here it works as well, I can't reproduce the issue.
I had exactly only one subscriber in the hlr - maybe that helps to reproduce it.
Can you inspect the ainfo structure given to db_sync_authinfo_for_subscr ? (like ki_len)
Also all the arguments to dbi_conn_queryf . Is ki_str NULL by anychance.
I can try that on monday.
Regards. Philipp