VerticaCopyStream fails with NullPointerException

Hi,

I'm getting NullPointerException during copy stream.

Is there any way to understand what is going wrong?

java.lang.NullPointerException: null
	at com.vertica.util.ProtocolUtils.encodeUTF8(Unknown Source) ~[vertica-jdbc-7.0.1-0.jar:na]
	at com.vertica.io.CopyErrorRequestMessage.send(Unknown Source) ~[vertica-jdbc-7.0.1-0.jar:na]
	at com.vertica.io.ProtocolStream.sendMessage(Unknown Source) ~[vertica-jdbc-7.0.1-0.jar:na]
	at com.vertica.core.VConnection.handleError(Unknown Source) ~[vertica-jdbc-7.0.1-0.jar:na]
	at com.vertica.dataengine.VQueryExecutor.handleExecuteResponse(Unknown Source) ~[vertica-jdbc-7.0.1-0.jar:na]
	at com.vertica.dataengine.VQueryExecutor.execute(Unknown Source) ~[vertica-jdbc-7.0.1-0.jar:na]
	at com.vertica.jdbc.VerticaCopyStream.execute(Unknown Source) ~[vertica-jdbc-7.0.1-0.jar:na]