JDBC for 7.0 - Tuple received before MetaData exception

Hello,

I'm currently going over my log files to search for suspect error
messages. I found one suspicous error message(I only have one instance of
this exception in my log files). Does anybody know what the reason for this
error could be ? e.g. something on the database server side, concurrency
problems etc.

Regards,

Gunnar

[abJDBCServer] doQuery(LocationDS) "SELECT LOC_ID , LOC_TYPE , LOC_NAME , LOC_PARENT FROM LOCATION WHERE LOC_PARENT IS NULL AND NOT LOC_TYPE=0 ORDER BY LOC_NAME"
abJDBCServer: handle open link exception = Tuple received before MetaData.
Tuple received before MetaData.
at java.lang.Throwable.fillInStackTrace(Native Method)
at java.lang.Throwable.fillInStackTrace(Compiled Code)
at java.lang.Throwable.<init>(Compiled Code)
at java.lang.Exception.<init>(Compiled Code)
at java.sql.SQLException.<init>(Compiled Code)
at org.postgresql.util.PSQLException.<init>(PSQLException.java:22)
at org.postgresql.Connection.ExecSQL(Compiled Code)
at org.postgresql.jdbc2.Statement.execute(Compiled Code)
at org.postgresql.jdbc2.Statement.executeQuery(Compiled Code)
at progress.apptivity.agent.server.abJDBCServer.doQueryImpl(Compiled Code)
at progress.apptivity.agent.server.abJDBCServer.doQueryImpl(Compiled Code)
at progress.apptivity.agent.server.abJDBCServer.doQuery(Compiled Code)
at progress.apptivity.agent.server.abJDBCServer.serverRequest(Compiled Code)
at SearchFasterServerEvents.serverRequest(Compiled Code)
at progress.apptivity.server.abServer.serverRequest(Compiled Code)
at progress.apptivity.server.abQuerySetImpl.serverRequest(Compiled Code)
at progress.apptivity.client.iiop._abQuerySetImplBase.invoke(Compiled Code)
at IE.Iona.OrbixWeb.CORBA.ServerDispatcher.dispatch(Compiled Code)
at IE.Iona.OrbixWeb.CORBA.ServerDispatcher.system_dispatch(Compiled Code)
at IE.Iona.OrbixWeb.CORBA.BOAImpl.continueThreadDispatch(Compiled Code)
at IE.Iona.OrbixWeb.CORBA.ORB.continueThreadDispatch(Compiled Code)
at progress.apptivity.server.iiop.ow.a25.run(Compiled Code)
at java.lang.Thread.run(Compiled Code)