Bug 135790 ClassCastException in RowData.
ClassCastException is thrown in RowData line 81(IBaseExpression expr = ( IBaseExpression ) valueExpressions.get( index - 1 );).
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/script/internal/instance/RowInstance.java
public void setBookmark( String bookmark )
	{
		row.setBookmark( bookmark );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.api.script.instance.IRowInstance#getHeight()
	 */
	public String getHeight( )
	{
		if ( row.getHeight( ) != null )
			return row.getHeight( ).toString( );
		return null;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.api.script.instance.IRowInstance#setHeight(java.lang.String)
	 */
	public void setHeight( String height )
	{
		row.setHeight( DimensionType.parserUnit( height ) );
	}
	public IRowData getRowData( )
	{
		return data;
	}
}