Setting the temp dir for the Spreadsheet_Excel_Writer class problems found in some servers due the tempnam PHP function. tmp file set to api_get_path(SYS_ARCHIVE_PATH) see BT#836 Thanks to Noa for reporting it.

main/exercice/exercise_result.class.php

@@ -343,6 +343,8 @@ class ExerciseResult
 		}		//build the results
 		require_once(api_get_path(LIBRARY_PATH).'pear/Spreadsheet_Excel_Writer/Writer.php');
 		$workbook = new Spreadsheet_Excel_Writer();
+		$workbook ->setTempDir(api_get_path(SYS_ARCHIVE_PATH));
+		
 		$workbook->send($filename);
 		$worksheet =& $workbook->addWorksheet('Report '.date('YmdGis'));
 		$line = 0;

main/gradebook/gradebook_result.class.php

@@ -255,6 +255,8 @@ class GradeBookResult
 		//build the results
 		require_once(api_get_path(LIBRARY_PATH).'pear/Spreadsheet_Excel_Writer/Writer.php');
 		$workbook = new Spreadsheet_Excel_Writer();
+		$workbook ->setTempDir(api_get_path(SYS_ARCHIVE_PATH));
+		
 		$workbook->send($filename);
 		$worksheet =& $workbook->addWorksheet('Report '.date('YmdGis'));
 		$line = 0;

main/inc/lib/debug.lib.inc.php

@@ -66,7 +66,6 @@ function debug_paths()
 	echo 'SYS_CODE_PATH :'.api_get_path(SYS_CODE_PATH).'<br />';
 	echo 'SYS_LANG_PATH :'.api_get_path(SYS_LANG_PATH).'<br />';
 	echo 'WEB_IMG_PATH :'.api_get_path(WEB_IMG_PATH).'<br />';
-	echo 'GARBAGE_PATH :'.api_get_path(GARBAGE_PATH).'<br />';
 	echo 'PLUGIN_PATH :'.api_get_path(PLUGIN_PATH).'<br />';
 	echo 'SYS_ARCHIVE_PATH :'.api_get_path(SYS_ARCHIVE_PATH).'<br />';
 	echo 'INCLUDE_PATH :'.api_get_path(INCLUDE_PATH).'<br />';

main/survey/survey.lib.php

@@ -3528,6 +3528,7 @@ class SurveyUtil {
 
 		require_once(api_get_path(LIBRARY_PATH).'pear/Spreadsheet_Excel_Writer/Writer.php');
 		$workbook = new Spreadsheet_Excel_Writer();
+		$workbook ->setTempDir(api_get_path(SYS_ARCHIVE_PATH));
 		$workbook->send($filename);
 		$worksheet =& $workbook->addWorksheet('Report 1');
 		$line = 0;