SQLServerException: Each GROUP BY expression must contain at least one column that is not an outer reference

select test2
from
 (select 'aaa' as test2 from ms.test_a) b
group by test2

01:36:55,198 WARN  [org.teiid.CONNECTOR] (Worker1_QueryProcessorQueue4) ks49tw3LLVqR Connector worker process failed for atomic-request=ks49tw3LLVqR.1.1.1: org.teiid.translator.jdbc.JDBCExecutionException: 164 TEIID11008:TEIID11004 Error executing statement(s): [Prepared Values: [] SQL: SELECT 'aaa' FROM "test_tables"."dbo"."test_a" g_0 GROUP BY 'aaa']
        at org.teiid.translator.jdbc.JDBCQueryExecution.execute(JDBCQueryExecution.java:131) [translator-jdbc-8.10.0.Beta2.jar:8.10.0.Beta2]
        at org.teiid.dqp.internal.datamgr.ConnectorWorkItem.execute(ConnectorWorkItem.java:335)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.7.0_51]
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [rt.jar:1.7.0_51]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.7.0_51]
        at java.lang.reflect.Method.invoke(Method.java:606) [rt.jar:1.7.0_51]
        at org.teiid.dqp.internal.datamgr.ConnectorManager$1.invoke(ConnectorManager.java:209)
        at com.sun.proxy.$Proxy47.execute(Unknown Source)
        at org.teiid.dqp.internal.process.DataTierTupleSource.getResults(DataTierTupleSource.java:298)
        at org.teiid.dqp.internal.process.DataTierTupleSource$1.call(DataTierTupleSource.java:110)
        at org.teiid.dqp.internal.process.DataTierTupleSource$1.call(DataTierTupleSource.java:107)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262) [rt.jar:1.7.0_51]
        at org.teiid.dqp.internal.process.FutureWork.run(FutureWork.java:58)
        at org.teiid.dqp.internal.process.DQPWorkContext.runInContext(DQPWorkContext.java:276)
        at org.teiid.dqp.internal.process.ThreadReuseExecutor$RunnableWrapper.run(ThreadReuseExecutor.java:119)
        at org.teiid.dqp.internal.process.ThreadReuseExecutor$3.run(ThreadReuseExecutor.java:210)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_51]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_51]
        at java.lang.Thread.run(Thread.java:744) [rt.jar:1.7.0_51]
Caused by: com.microsoft.sqlserver.jdbc.SQLServerException: Each GROUP BY expression must contain at least one column that is not an outer reference.
        at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDatabaseError(SQLServerException.java:216)
        at com.microsoft.sqlserver.jdbc.SQLServerStatement.getNextResult(SQLServerStatement.java:1515)
        at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.doExecutePreparedStatement(SQLServerPreparedStatement.java:404)
        at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement$PrepStmtExecCmd.doExecute(SQLServerPreparedStatement.java:350)
        at com.microsoft.sqlserver.jdbc.TDSCommand.execute(IOBuffer.java:5696)
        at com.microsoft.sqlserver.jdbc.SQLServerConnection.executeCommand(SQLServerConnection.java:1715)
        at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeCommand(SQLServerStatement.java:180)
        at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeStatement(SQLServerStatement.java:155)
        at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.executeQuery(SQLServerPreparedStatement.java:285)
        at org.jboss.jca.adapters.jdbc.WrappedPreparedStatement.executeQuery(WrappedPreparedStatement.java:462)
        at org.teiid.translator.jdbc.JDBCQueryExecution.execute(JDBCQueryExecution.java:123) [translator-jdbc-8.10.0.Beta2.jar:8.10.0.Beta2]
        ... 18 more

<datasource jndi-name="java:/mssql-test-tables" pool-name="sqlserverDS1" enabled="true">
	<connection-url>jdbc:sqlserver://localhost:1433;databaseName=test_tables</connection-url>
	<driver-class&gt;com.microsoft.sqlserver.jdbc.SQLServerDriver</driver-class&gt;
	<driver>com.microsoft.sqlserver</driver>
	<pool>
		<prefill>false</prefill>
		<use-strict-min>false</use-strict-min>
		<flush-strategy>FailingConnectionOnly</flush-strategy>
	</pool>
	<security>
		<user-name>test</user-name>
		<password>test</password>
	</security>
	<validation>
		<check-valid-connection-sql>select 1</check-valid-connection-sql>
	</validation>
</datasource>

...
<driver name="com.microsoft.sqlserver" module="com.microsoft.sqlserver"/>
...
<translator name="sqlserver" module="org.jboss.teiid.translator.jdbc"/>
...

   <model name="ms">
        <property name="importer.useFullSchemaName" value="false"/>
        <property name="importer.tableTypes" value="TABLE,VIEW"/>
		<property name="importer.importKeys" value="false"/>
		<property name="importer.schemaPattern" value="dbo"/>
        <source name="test_tables_ms" translator-name="sqlserver" connection-jndi-name="java:/mssql-test-tables"/>
    </model>