title: Can't import all data in neo4j via batch importer
body: <p>I'm trying to import in Neo4J nodes and relationships. I have 2 <code>.csv</code> files (tab separated) which look like this:</p>
  
  <p><strong>users.csv</strong> (it contains 10000 users)</p>
  
  <pre><code>userID   name
  1   Cedric
  2   Kirby
  3   Zachary
  4   Hoyt
  5   Ella
  6   Darrel
  ..........
  ..........
  ..........
  </code></pre>
  
  <p><strong>rels.csv</strong> (it contains 100.000 relationships between the previous users)</p>
  
  <pre><code>idRel   id1 id2
  1   4471    6462
  2   4824    382
  3   1936    9777
  4   4448    5431
  </code></pre>
  
  <p>I'm on Ubuntu 16 and I'm using <a href="https://github.com/jexp/batch-import" rel="nofollow noreferrer">jexp batch importer</a>. </p>
  
  <p>Doing <code>./import-mvn.sh test.db sample/users.csv sample/rels.csv</code> I can import correctly all 10000 users but only 6077 relationships (not 100.000, why?).</p>
  
  <p>I get this error in terminal: <code>[ERROR] Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.5.0:java (default-cli) on project batch-import: An exception occured while executing the Java class. null: InvocationTargetException: Node[100,used=false,rel=-1,prop=-1,labels=Inline(0x0:[]),light,secondaryUnitId=-1] not in use -&gt; [Help 1]</code></p>