Unable to XOG output the OBS structure

Document ID : KB000100605
Last Modified Date : 12/06/2018
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I am trying to XOG out a huge OBS and the XOG output only returns the Statistics without the OBS structure as below. Why?

<NikuDataBus xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../xsd/nikuxog_obs.xsd"> 
<Header action="write" externalSource="NIKU" objectType="obs" version=""/> 
<Object type="obsTypes"/> 
<Status state="SUCCESS"/> 
<Statistics insertedRecords="0" failureRecords="0" totalNumberOfRecords="259" updatedRecords="0"/> 
The Maximum xml node value applies to the XOG output files. If the MAX_XML_NODES is not big enough the XOG output won't include the OBS structure.
The governor settings are stored in a single governors.properties file located in <INSTALL_DIR>/config. The default value for the limit is MAX_XML_NODES=150000. You can temporally increase the Maximum XML Nodes and after you XOG the OBS out you should update the MAX XML setting back. It is not recommended to change permanently the value to be greater than 150000 as you can encounter Out of Memory (OOM) or time-out exceptions.