Hi again, so I recompiled without optimizations and SQL. The 100% CPU load got away, but still I do not get any results: I start up MServer: $ ./Mserver --dbinit="module(pathfinder);" !WARNING: GDKlockHome: created directory /Users/bluefire/MonetDB/var/ MonetDB4/dbfarm/demo/ !WARNING: GDKlockHome: ignoring empty or invalid .gdk_lock. !WARNING: BBPdir: initializing BBP. # MonetDB Server v4.22.0 # based on GDK v1.22.0 # Copyright (c) 1993-2008, CWI. All rights reserved. # Compiled for powerpc-apple-darwin8.11.0/32bit with 32bit OIDs; dynamically linked. # Visit http://monetdb.cwi.nl/ for further information. # PF/Tijah module v0.5.0 loaded. http://dbappl.cs.utwente.nl/pftijah # MonetDB/XQuery module v0.22.0 loaded # XRPC administrative console at http://127.0.0.1:50001/admin MonetDB> On another terminal I run a simple test: $ cat > test.xq (1, 42.0, "Hello World", <node attr="value">test</node>) $ ./mclient -lx test.xq _ (blink blink blink ...) and there it hangs. So I go back to the server to see what's up. I tried the "threads()" and "clients()" commands. Well, to me all looks fine except that the "monetdb" client does not seem to have actually sent any command (""). Funnily when I got back to the first terminal, the mclient command had completed. So I tried again. It seems that the mclient command will complete as soon as I hit "return" a couple of times on the MonetDB> prompt. The same goes for the mjclient command. Ah! A known problem - this is what you had asked me to do in the other mail! Do you have any idea how I can turn this off so it works without me hitting <return>? Cheers, Richard