All, Do I need to start the server with any special options in order to connect to it via jdbc? I have installed the driver in DBVisualizer v9.1.7 and am using the URL jdbc:monetdb://mrsvm1d:50000/pytest but I keep getting connection refused errors from the driver (included below). When I connect locally via mclient, I have: Welcome to mclient, the MonetDB/SQL interactive terminal (unreleased) Database: MonetDB v11.24.0 (unreleased), 'mapi:monetdb://mrsvm1d:50000/pytest' Type \q to quit, \? for a list of available commands auto commit mode: on sql> Here is my server command line (do I need to change the mapi items?): /opt/mr/monetdb/bin/mserver5.bin --set gdk_nr_threads 3 --dbpath=/home/da64666/MonetDB/pytest --set merovingian_uri mapi:monetdb://mrsvm1d:50000/pytest --set mapi_open false --set mapi_port 0 --set mapi_usock /home/da64666/MonetDB/pytest/.mapi.sock --set monet_vault_key /home/da64666/MonetDB/pytest/.vaultkey --set gdk_nr_threads 2 --set max_clients 64 --set sql_optimizer default_pipe --set embedded_py true --set monet_daemon yes Thanks, Dave java.sql.SQLException: Unable to connect (mrsvm1d:50000): Connection refused: connect at nl.cwi.monetdb.jdbc.MonetConnection.<init>(MonetConnection.java:244) at nl.cwi.monetdb.jdbc.MonetDriver.connect(MonetDriver.java:166) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.onseven.dbvis.g.B.D.?(Z:1413) at com.onseven.dbvis.g.B.F$A.call(Z:1474) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) SQLException: SQLState(08006) registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@130b7ed registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@7e673e registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@115a9a7 registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@1057d25 registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@1abd8e3 registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@63900c registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@1ff6814 registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@9a6101 registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@74e0a3 registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@a0148b registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@1070f4 registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@9701ad registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@1b6da12 registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@1769a58 registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@4ea676 registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@2d0f93 registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@1c2163a registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@1056ee7 registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@1570d7b registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@18b128d registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@fae160 registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@17d9594 registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@cb361 registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@c1f8d registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@8fe97c registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@1108377 registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@faf9a3 registerDriver: nl.cwi.monetdb.jdbc.MonetDriver@1c77aba java.sql.SQLException: Unable to connect (mrsvm1d:50000): Connection refused: connect at nl.cwi.monetdb.jdbc.MonetConnection.<init>(MonetConnection.java:244) at nl.cwi.monetdb.jdbc.MonetDriver.connect(MonetDriver.java:166) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.onseven.dbvis.g.B.D.?(Z:1413) at com.onseven.dbvis.g.B.F$A.call(Z:1474) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source)