### Description I'm noticing an issue with certain RPC after upgrading to 5.6. I'm using "db_postgres". If I run ul.flush like this: ``` kamcmd ul.flush # no output ``` None of the in-memory registrations are flushed to the DB and in the log I see a bunch of lines like this: ``` May 12 20:39:16 <dummy-hostname> /usr/sbin/kamailio[9006]: ERROR: <core> [db.c:481]: db_use_table(): invalid connection parameter May 12 20:39:16 <dummy-hostname> /usr/sbin/kamailio[9006]: ERROR: usrloc [ucontact.c:1142]: db_update_ucontact_ruid(): sql use_table failed May 12 20:39:16 <dummy-hostname> /usr/sbin/kamailio[9006]: ERROR: usrloc [urecord.c:433]: wb_timer(): updating contact in db failed (aor: fake-1(a)aor.com) May 12 20:39:16 <dummy-hostname> /usr/sbin/kamailio[9006]: ERROR: <core> [db.c:481]: db_use_table(): invalid connection parameter May 12 20:39:16 <dummy-hostname> /usr/sbin/kamailio[9006]: ERROR: usrloc [ucontact.c:1142]: db_update_ucontact_ruid(): sql use_table failed May 12 20:39:16 <dummy-hostname> /usr/sbin/kamailio[9006]: ERROR: usrloc [urecord.c:433]: wb_timer(): updating contact in db failed (aor: fake-2(a)aor.com) ``` I see the same thing with ul.db_users: ``` kamcmd ul.db_users location # returns the following output error: 500 - Failed to use table # in the log ERROR: <core> [db.c:481]: db_use_table(): invalid connection parameter ``` ### Troubleshooting #### Reproduction Seems to happen consistently on 5.6, using psql as the db engine. I tested on 5.4 and it's not happening. It's easier to test with ```kamcmd ul.db_users location``` because you need registrations that haven't been flushed to the DB for the error to manifest. * **Operating System**: ``` Distributor ID: Debian Description: Debian GNU/Linux 10 (buster) Release: 10 Codename: buster Kernel: 4.19.0-21-cloud-amd64 ``` -- Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/3452 You are receiving this because you are subscribed to this thread. Message ID: &lt;kamailio/kamailio/issues/3452(a)github.com&gt;