I tried to export the grades in Excel some days ago and everything worked perfectly. However, today I tried to export them again because the students have finished other activities and I wanted to have the up-to-date grades and an error page appears to me everytime I try it with these kinds of errors:
Warning: Cannot modify header information - headers already sent by (output started at /extern/web/httpd/htdocs/moodle/lang/ca/dfwiki.php:166) in /extern/web/httpd/htdocs/moodle/grade/lib.php on line 1203
Warning: Cannot modify header information - headers already sent by (output started at /extern/web/httpd/htdocs/moodle/lang/ca/dfwiki.php:166) in /extern/web/httpd/htdocs/moodle/grade/lib.php on line 1205
Warning: Cannot modify header information - headers already sent by (output started at /extern/web/httpd/htdocs/moodle/lang/ca/dfwiki.php:166) in /extern/web/httpd/htdocs/moodle/grade/lib.php on line 1206
Warning: Cannot modify header information - headers already sent by (output started at /extern/web/httpd/htdocs/moodle/lang/ca/dfwiki.php:166) in /extern/web/httpd/htdocs/moodle/grade/lib.php on line 1207
Warning: Cannot modify header information - headers already sent by (output started at /extern/web/httpd/htdocs/moodle/lang/ca/dfwiki.php:166) in /extern/web/httpd/htdocs/moodle/grade/lib.php on line 1208
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Could someone tell me what I have done wrong? To what is refering when it says "header information"? I'm lost...