Notice: Use of undefined constant GChart_CLASSES_DIR - assumed 'GChart_CLASSES_DIR' in C:\Work\rnia\lib\vendor\GChart\gchart-0.1\classes\GChart_Pie.php on line 2

Warning: require_once(GChart_CLASSES_DIRGChart.php): failed to open stream: No such file or directory in C:\Work\rnia\lib\vendor\GChart\gchart-0.1\classes\GChart_Pie.php on line 2

Fatal error: require_once(): Failed opening required 'GChart_CLASSES_DIRGChart.php' (include_path='C:\xampp_564\php\PEAR') in C:\Work\rnia\lib\vendor\GChart\gchart-0.1\classes\GChart_Pie.php on line 2