Bug 153514 [Regression]Can't Drill-Through to reportdesign which is in the current path
Description: Can't Drill-Through to reportdesign which is in the current path Step to reproduce: 1. new a report named "target.rptdesign" and add label 2. new another report named "Drillthrough.rptdesign" and also add a label in it 3. Choose the lable in second report and edit its Hyperlink: Drill through target.rptdesign 4. preview it by any form Excepted result: Target.rptdesign can be drill-throughed Actual result: Display "The design file /D:/Eclipses/eclipse200608110630/plugins/org.eclipse.birt.report.viewer_2.1.0.v20060811-0630/birt/documents/4F9E34353BCD20DC7687037D6B8B7A25/Acceptance/Target.rptdesign can not be found. " But if Drill-Through with absolute path is ok.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/ReportDocumentReader.java
{
			return null;
		}
		TOCNode node = findTOC( tocNodeId );
		if ( node != null )
		{
			return node.getChildren( );
		}
		return null;
	}
	/**
	 * load the TOC from the stream.
	 */
	protected void loadTOC( )
	{
		tocRoot = new TOCNode( );
		if ( archive.exists( TOC_STREAM ) )
		{
			InputStream in = null;
			try
			{
				in = archive.getStream( TOC_STREAM );
				DataInputStream input = new DataInputStream( in );
				TOCBuilder.read( tocRoot, input );
			}
			catch ( Exception ex )
			{
				logger.log( Level.SEVERE, "Failed to load the TOC", ex ); 
			}
			finally