C:\$download\OSM>c:\Utils\OSM\osmosis-0.37\bin\osmosis.bat --rb us-west.osm.pbf --bp file=california.poly --wb california.osm.pbf
Nov 4, 2010 8:34:58 PM org.openstreetmap.osmosis.core.Osmosis run
INFO: Osmosis Version 0.37
Nov 4, 2010 8:34:58 PM org.openstreetmap.osmosis.core.Osmosis run
INFO: Preparing pipeline.
Nov 4, 2010 8:34:58 PM org.openstreetmap.osmosis.core.Osmosis main
SEVERE: Execution aborted.
org.openstreetmap.osmosis.core.OsmosisRuntimeException: The following named pipes () and 2 default pipes have not been terminated with appropriate output sinks.
        at org.openstreetmap.osmosis.core.pipeline.common.Pipeline.connectTasks(Pipeline.java:94)
        at org.openstreetmap.osmosis.core.pipeline.common.Pipeline.prepare(Pipeline.java:116)
        at org.openstreetmap.osmosis.core.Osmosis.run(Osmosis.java:86)
        at org.openstreetmap.osmosis.core.Osmosis.main(Osmosis.java:37)
        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 org.codehaus.plexus.classworlds.launcher.Launcher.launchStandard(Launcher.java:329)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:239)
        at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
        at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
        at org.codehaus.classworlds.Launcher.main(Launcher.java:31)