[LON-CAPA-admin] Course Map Undefined Error

[Stuart Raeburn]

Hi,

> The error message: 'Coursemap undefined' will be shown when a student
> attempts to display the Course Contents screen, when either or both of
> the following items:
>
> map_start_/uploaded/purdue/<coursenum>/default.sequence
> map_end_/uploaded/purdue/<coursenum>/default.sequence

A correction ...

The second item should be:
map_finish_/uploaded/purdue/<coursenum>/default.sequence

>> "Course Map  Undefined" error. They seem to have to log out and   
>> login to get back  to the problem.

Clicking the "Courses" link at top right, and then pushing the  
"Re-select" button for the particular course should enable access once  
again to the particular problem, i.e., without logout and re-login.

Stuart Raeburn
LON-CAPA Academic Consortium


> Hi Joyce,
>
> The error message: 'Coursemap undefined' will be shown when a student
> attempts to display the Course Contents screen, when either or both of
> the following items:
>
> map_start_/uploaded/purdue/<coursenum>/default.sequence
> map_end_/uploaded/purdue/<coursenum>/default.sequence
>
> are absent from the user's course session hash, found in the GDBM file:
>
> /home/httpd/perl/tmp/<username>_<courseid>.db
>
> where <courseid> is the LON-CAPA course ID, e.g.,
> purdue_22608011029874510purduel1
>
> On the command line you can use the script: /home/httpd/perl/debug/dump_db.pl
> to view the contents of a GDBM file in LON-CAPA.
>
> The perl module which performs the page flip in response to a student
> pressing either the forward or backward green arrow is:
> /home/httpd/lib/perl/Apache/lonpageflip.pm.
>
>> It appears that when scrolling through  problems using the Green   
>> Arrow, the problem takes a long time to  load.
>
> Is the issue always with the same problem?  What resource is it?  Is
> there discussion attached to the instance of the problem in the course?
>
> If you are able to reproduce this error, what are the timestamps for
> the GDBM files:
>
> /home/httpd/perl/tmp/<username>_<courseid>.db
> /home/httpd/perl/tmp/<username>_<courseid>_parms.db
>
> for your user session when this occurs?  Were they recently created,
> for example because the course contents were updated by a Course
> Coordinator within the past 20 minutes?
>
>
> Stuart Raeburn
> LON-CAPA Academic Consortium
>
> Quoting "Young, Joyce E" <young257 at purdue.edu>:
>
>> We are having issues in one of our courses with students receiving   
>> a  "Course Map Undefined" error. It appears that when scrolling   
>> through  problems using the Green Arrow, the problem takes a long   
>> time to  load. The students then go to Course Contents to try to   
>> access the  problem in a different fashion, and then they get the   
>> "Course Map  Undefined" error. They seem to have to log out and   
>> login to get back  to the problem.
>> If they refresh the page instead of clicking on Contents, it gives   
>>  them "End of Sequence". Since they are not done, they still have  
>> to   click on Contents, which gives them the "Course Map Undefined"  
>>  error.
>> Please advise.
>>                                                                Thanks,
>>                                                                      
>>             Joyce Young
>>
>> Joyce Young
>> Programmer/Analyst
>> ITAS - Student Systems Competency Center
>> Purdue University
>> 3495 Kent Avenue, Suite 100
>> West Lafayette, IN 47906
>> Phone: (765) 427-6340
>> Fax: (765) 464-2233
>> Campus Mail: ROSS
>> young257 at purdue.edu<mailto:young257 at purdue.edu>
>
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