Bug 156166 Error occour when previewing attached report in web viewer.
Decription:Error occour when previewing attached report in web viewer. Steps to reproduce: 1.run attached reports in web viewer. Expeceted results: preview properly Actual results: Error occour when previewing the reports in web viewer while it works properly in html and PDF
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/document/util/ExprDataReader1.java
if ( version == VersionManager.VERSION_2_0 )
		{
			int exprCount;
			int gapRows = absoluteRowIndex - currReadIndex;
			for ( int j = 0; j < gapRows; j++ )
			{
				exprCount = IOUtil.readInt( rowExprsDis );
				for ( int i = 0; i < exprCount; i++ )
				{
				
					IOUtil.readObject( rowExprsDis );
				}
			}
		}
		else
		{
			rowLenRAIs.seek( absoluteRowIndex * INT_LENGTH );
			int rowOffsetAbsolute = IOUtil.readInt( rowLenRAIs );
			
			rowExprsRAIs.seek( rowOffsetAbsolute + this.metaOffset ); 
			rowExprsDis = new DataInputStream( rowExprsRAIs );
		}
	}
	
	/**
	 * @throws IOException
	 */
	private Map getValueMap( ) throws IOException
	{
		Map valueMap = new HashMap( );