`Sep 25, 2012 1:01:50 PM org.openstreetmap.osmosis.core.pipeline.common.ActiveTaskManager waitForCompletion
SEVERE: Thread for task 1-rb failed
java.lang.AbstractMethodError: org.mapsforge.map.writer.osmosis.MapFileWriterTas
k.initialize(Ljava/util/Map;)V
        at crosby.binary.osmosis.OsmosisReader.run(OsmosisReader.java:43)
        at java.lang.Thread.run(Unknown Source)
Sep 25, 2012 1:01:50 PM org.openstreetmap.osmosis.core.Osmosis main
SEVERE: Execution aborted.
org.openstreetmap.osmosis.core.OsmosisRuntimeException: One or more tasks failed
.
        at org.openstreetmap.osmosis.core.pipeline.common.Pipeline.waitForComple
tion(Pipeline.java:146)
        at org.openstreetmap.osmosis.core.Osmosis.run(Osmosis.java:92)
        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(Laun
cher.java:329)`