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I'm having a problem setting up datanucleus enhancer to use with a google app engine project. If I use the datanucleus eclipse plugin everything goes well, but in my maven project I get a strange conflicting version error. My POM has these datanucleus references: <dependency> <groupId>org.datanucleus</groupId> <artifactId>datanucleus-core</artifactId> <version>1.1.0</version> </dependency> ... <plugin> <groupId>org.datanucleus</groupId> <artifactId>maven-datanucleus-plugin</artifactId> <version>1.1.0</version> <configuration> <mappingIncludes>**/*.class</mappingIncludes> <verbose>true</verbose> <enhancerName>ASM</enhancerName> <api>JDO</api> </configuration> <executions> <execution> <phase>compile</phase> <goals> <goal>enhance</goal> </goals> </execution> </executions> </plugin> When I try to build the project I get the following error: Exception in thread "main" Plugin (Bundle) "org.datanucleus" is already registered. Ensure you dont have multiple JAR versions of the same plugin in the classpath. The URL "file:/Users/drome/.m2/repository/org/datanucleus/datanucleus-core/1.1.0/**datanucleus-core-1.1.0.jar**" is already registered, and you are trying to register an identical plugin located at URL "file:/Users/drome/.m2/repository/org/datanucleus/datanucleus-core/1.1.3/**datanucleus-core-1.1.3.jar**." org.datanucleus.exceptions.NucleusException: Plugin (Bundle) "org.datanucleus" is already registered. Ensure you dont have multiple JAR versions of the same plugin in the classpath. The URL "file:/Users/drome/.m2/repository/org/datanucleus/datanucleus-core/1.1.0/datanucleus-core-

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