Hi moodlers, 
I have checked the forums and I can see the a lot have had similar problems to this over time, but not exactly the same...
When I check a complete activity report all survey graphs work fine except for the recently added "Critical Incidents" survey which displays the infamous X-box (no image).
As I said, all other graphs work fine, it's just this one. Now this survey is a qualitative one, so perhaps the problem is that a graph is not appropriate here? I am using 1.2.1 on LAMP.
When I view the image link - http://courses.discoverlanguage.com/mod/survey/graph.php?id=587&sid=197&type=student.png - in my browser, I get this:
Warning: Wrong parameter count for max() in /home/discove/public_html/courses/mod/survey/graph.php on line 496
Warning: Wrong parameter count for max() in /home/discove/public_html/courses/mod/survey/graph.php on line 497
Warning: Division by zero in /home/discove/public_html/courses/lib/graphlib.php on line 998
Warning: Division by zero in /home/discove/public_html/courses/lib/graphlib.php on line 1000
Warning: Division by zero in /home/discove/public_html/courses/lib/graphlib.php on line 686
Warning: Division by zero in /home/discove/public_html/courses/lib/graphlib.php on line 692
Warning: Invalid argument supplied for foreach() in /home/discove/public_html/courses/lib/graphlib.php on line 722
Warning: Invalid argument supplied for foreach() in /home/discove/public_html/courses/lib/graphlib.php on line 722
Warning: Invalid argument supplied for foreach() in /home/discove/public_html/courses/lib/graphlib.php on line 722
Warning: Invalid argument supplied for foreach() in /home/discove/public_html/courses/lib/graphlib.php on line 769
Warning: Invalid argument supplied for foreach() in /home/discove/public_html/courses/lib/graphlib.php on line 546
Warning: Invalid argument supplied for foreach() in /home/discove/public_html/courses/lib/graphlib.php on line 281
Warning: Invalid argument supplied for foreach() in /home/discove/public_html/courses/lib/graphlib.php on line 281
Warning: Invalid argument supplied for foreach() in /home/discove/public_html/courses/lib/graphlib.php on line 281
Warning: Invalid argument supplied for foreach() in /home/discove/public_html/courses/lib/graphlib.php on line 281
Warning: Invalid argument supplied for foreach() in /home/discove/public_html/courses/lib/graphlib.php on line 281
Warning: Invalid argument supplied for foreach() in /home/discove/public_html/courses/lib/graphlib.php on line 281
Warning: Cannot modify header information - headers already sent by (output started at /home/discove/public_html/courses/mod/survey/graph.php:496) in /home/discove/public_html/courses/lib/graphlib.php on line 1468
덽NG IHDR?R-oPLTER???솛儆f셟???拙尊傳硼汾儆333fff솛????옜욀賽윜?__{dOD?DATx쒗?VV괙Q@???뙇$8켚&}?{??聆}KuwE뉫惑實多a??炘Gr??롞悚Ow?<\圓桭釋s?욐?歎?t?巫希什蕓?꽢??誦皺쐾?눵U
I think this may be a bug but am not sure if it has been fixed in the latest CVS...but I see no reference to it in the forums.
Any feedback on this one please?
Tim.
Here is the empty graph screen:
