I've upgraded my Moodle to 1.31 and created a survey.
Everyhting is OK and users can answer the questions in the survey.
The problem is:
After finishing the survey, the user can's see the results (graph) of his survey.
I see there is only a x which link to http://moodle.ntjcpa.edu.tw/mod/survey/graph.php?id=76&sid=3&group=0&type=student.png
It seems that the graph file is not there? Is this a bug or my system problem?
Thanks for your help.