I'm having trouble retrieving 2 artifacts in my Maven/Java/Google App Engine project:

1. com.google.appengine.orm:datanucleus-appengine:jar:1.0.7.final
2. com.google.appengine:appengine-api-1.0-sdk:jar:1.3.4

There's a similar question posted, but each answer brings me back to the same error message.

More detail

I don't know if it is relevant, but rather than a version number, my original dependency for DataNucleus contained a variable. I am using Eclipse.

<groupId>org.datanucleus</groupId>
        <artifactId>datanucleus-core</artifactId>
        <version>${datanucleus.version}</version>
        <scope>runtime</scope>

I did not include my stack trace in Maven for brevity's sake. Please let me know if it would help to post it. Thank you.