Hi,
This error occurs due to less JVM memory allocated to Virtual Dataport server. I had resolved this error by increasing the JVM memory by following the steps as suggested in the knowledge base article [JVM Memory Settings Configuration](https://community.denodo.com/kb/view/document/JVM%20Memory%20Settings%20Configuration?category=Installation+%26+Updates).
For memory settings, you can refer to section “Recommended settings for the JVM in memory-demanding scenarios” in the knowledge base article [Denodo Admin and Development Best Practices](https://community.denodo.com/kb/view/document/Denodo%20Admin%20and%20Development%20Best%20Practices?category=Best+Practices).
Hope this helps!