Bug 178465 Group change causes failure in the Web Viewer
Attached report has script on the group onprepare method which determines the keyexpr based a on a report parameter. When ran in the M5 build this fails in the Web Viewer. Jason
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/executor/QueryItemExecutor.java
if ( query != null )
		{
			try
			{
				rset = (IQueryResultSet) context.executeQuery( parentRset,
						query );
				context.setResultSet( rset );
				if ( rset != null )
				{
					rsetEmpty = !rset.next( );
					return;
				}
			}
			catch ( BirtException ex )
			{
				context.addException( ex );
			}
		}
	}
	protected void accessQuery( ReportItemDesign design, IContentEmitter emitter )
	{
	}
	public void reset( )
	{
		rset = null;
		rsetEmpty = false;
		super.reset( );
	}
}