| topic started 11/6/2001; 2:21:39 PM last post 11/6/2001; 8:54:43 PM |
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11/6/2001; 8:54:43 PM (reads: 1007, responses: 0) |
| First,
deleting problems is a rather dangerous thing to do if students have
already begun working on an assignment. For example, it will screw up
the "fail safe" backup .sco files (the numbering of problems in those
files will change). Hopefully you will never need to use these fail
safe files but they are very nice to have around incase your database
gets destroyed or damaged. Rather than delete problems, you can give
all students full credit (or zero credit) for "bad" problems. Giving
them full credit makes students happy. Now to answer your question. Most likely you have deleted the problem(s) but not the cached latex2html images which are indexed by the problem numbers (which have been changed). In version 1.7, if you delete a problem, all cached latex2html images are destroyed but in version prior to 1.7, the user has to do this. So if you delete problem 6, cached images for problem 6 and all higher numbered problems will be invalid. The solution is to remove the (invalid) cached images and then recreatre them. |