[LON-CAPA-users] Printing with version 2.11.1

Thu Jun 25 11:26:33 EDT 2015

I have forwarded the information to our IT guy.  I'll keep you posted.

Rex Abert
Associate Professor of Mathematics
Tallahassee Community College
________________________________________
From: lon-capa-users-bounces at mail.lon-capa.org [lon-capa-users-bounces at mail.lon-capa.org] on behalf of Stuart Raeburn [raeburn at msu.edu]
Sent: Thursday, June 25, 2015 10:58 AM
To: lon-capa-users at mail.lon-capa.org
Subject: Re: [LON-CAPA-users] Printing with version 2.11.1

Rex,

> So that leaves us with the following options ...

There is another option:

Ask your server administrator to run:

yum update

to install newer versions of ImageMagick and ImageMagick-perl on
loncapa.tcc.fl.edu

I have now added newer ImageMagick and ImageMagick-perl rpms
(6.8.9-7.centos6.lc) to the LON-CAPA CentOS 6 repository for 32 bit
and 64 bit architectures:

http://install.loncapa.org/centos/loncapa/6/x86_64/
http://install.loncapa.org/centos/loncapa/6/i386/

I tested printout generation of:
/res/msu/kortemey/physicsprecourse/geometry/arclength.problem

and it worked without error (i.e., created a non-blank PDF), after I
updated a CentOS 6 VM to use these newer versions of ImageMagick to
convert the arc.jpg image to arc.jpg.eps, and then reloaded the Apache
web server:

/etc/init.d/httpd reload

Stuart Raeburn
LON-CAPA Academic Consortium

Quoting Rex Abert <ABERTR at tcc.fl.edu>:

> Stuart & Gerd-
>
> Here is what I've found.
>
> 1) The TeX file looks OK.
> 2) The dvi file looks OK, with placeholders for the images to come later.
> 3) The .ps file mostly displays OK, but with errors on the resources
>  that contain images from Gerd, and no corresponding eps file for
> the  image.  Pages that do not contain such an image have no issues.
> 4) The conversion to pdf gives up upon reaching the first image
> without a corresponding eps file.
>
> So that leaves us with the following options:  Gerd: Would you be
> willing to drop in some eps files for the images in your resources?
>  (If needed, I could snag the jpegs and convert them in GIMP and
> email them back to you.)  I would like to use the few problems
> relating to Trigonometry  in the same folder as the problem listed
> below.  If not, I could reproduce the problem in my own directory.
>
> Thanks!
>
> Rex Abert
> Associate Professor of Mathematics
> Tallahassee Community College
> ________________________________________
> From: lon-capa-users-bounces at mail.lon-capa.org
> [lon-capa-users-bounces at mail.lon-capa.org] on behalf of Rex Abert
> [ABERTR at tcc.fl.edu]
> Sent: Thursday, June 25, 2015 8:41 AM
> To: Discussion list for LON-CAPA users
> Subject: Re: [LON-CAPA-users] Printing with version 2.11.1
>
> I'll look into this some more.  The problem cited is the third one
> in a homework folder.  When printing all problems in the folder, I
> get a pdf containing the first two problems, and nothing else.  Your
>  tips should help me troubleshoot exactly where the issue is---it
> could be in the second problem, perhaps.
>
> Anyway, thanks for the tips and I'll  see what I find.
>
> Rex Abert
> Associate Professor of Mathematics
> Tallahassee Community College
> ________________________________________
> From: lon-capa-users-bounces at mail.lon-capa.org
> [lon-capa-users-bounces at mail.lon-capa.org] on behalf of Stuart
> Raeburn [raeburn at msu.edu]
> Sent: Wednesday, June 24, 2015 8:49 AM
> To: lon-capa-users at mail.lon-capa.org
> Subject: Re: [LON-CAPA-users] Printing with version 2.11.1
>
> Hi Rex,
>
> For this resource:
>
> /res/msu/kortemey/physicsprecourse/geometry/arclength.problem
>
> the print utility in LON-CAPA generates a non-blank PDF when using any
> of the servers in the msu domain, or any of the *educog.com servers
> (all running LON-CAPA 2.11.1).
>
> I switched my web session to a number of other servers in the network
> currently running 2.11.1 and found that a non-blank PDF was also
> generated on servers in other domains where the Linux distro was
> CentOS 5 or 7, or Ubuntu 12 or 14.  However, a blank PDF was the
> result on some (but not all) servers running CentOS 6.
>
>> ... Now, I just get a link to the pdf file  and nothing else.  Is
>> there a way to find the log and TeX files with  2.11.1?
>
> There has not been a change in the display of links to the .log and
> .tex files in 2.11.1 as compared with earlier LON-CAPA versions.
>
> Those links are displayed to "advanced users" (e.g., Course
> Coordinators, Authors/Co-authors etc.) when an "Emergency stop" is
> found in the log file.
>
> If printout generation is successful and the various stages of the
> process are completed (i.e., calls to latex, dvips, ps2pdf13 complete
> etc.) then the corresponding files with extensions  .log, .tex, .ps
> and .pdf will remain in the prtspool directory, until the nightly
> clean-up by cleanup_file_caches.pl.
>
> You can access the .log, .tex etc. files by replacing the .pdf
> extension, with the extension for the desired file in your browser's
> address box. If you right click (or ctrl-click for Mac) on the link:
> "Your PDF file" in the text:
>
> <Name> - Your PDF file is ready for download, in the final printout
> generation screen then you can copy the link location, which will be
> of the form:
> http://loncapa.tcc.fl.edu/prtspool/<user>_<domain>_<identifier>.pdf
>
> Comparing sizes for the various files generated when printing
> /res/msu/kortemey/physicsprecourse/geometry/arclength.problem
> (imported into a course) in the same course for the same user on msua4
> (i.e., s4.lite.msu.edu) versus tccfll1 (i.e., loncapa.tcc.fl.edu) I
> find:
>
> 2412 msua4.dvi
> 26010 msua4.log
> 30978 msua4.pdf
> 999358 msua4.ps
> 3740 msua4.tex
> 1001384 msua4temporar.ps
>
> 2408 tccfll1.dvi
> 26010 tccfll1.log
> 9360 tccfll1.pdf
> 1003401 tccfll1.ps
> 3740 tccfll1.tex
> 1005427 tccfll1temporar.ps
>
> A diff of tccfll1.tex and msua4.tex reports no differences.
>
> However the .dvi files are different, and in addition the .ps file
> generated on loncapa.tcc.fl.edu cannot be displayed with a postscript
> viewer.
>
> The issue would seem to be in the generation of the .dvi file within
> cgi-bin/printout.pl from the command:
>
> "latex filename.tex 1>/dev/null 2>/dev/null"
>
> where filename is the name of the .tex file.
>
> Note: loncapa.tcc.fl.edu and s4.lite.msu.edu have the same Linux
> distro, and architecture.
>
>
> Stuart Raeburn
> LON-CAPA Academic Consortium
>
>
> Quoting Rex Abert <ABERTR at tcc.fl.edu>:
>
>> I'm having difficulty printing some resources after our system was
>> upgraded to 2.11.1.  Previously, if there was a TeX error, Lon-Capa
>> would provide links to the log file and the original TeX file to
>> assist in troubleshooting.  Now, I just get a link to the pdf file
>> and nothing else.  Is there a way to find the log and TeX files with
>>  2.11.1?
>>
>> For what it's worth, the resource that is causing the error is
>>
>> /res/msu/kortemey/physicsprecourse/geometry/arclength.problem
>>
>> (Sorry, Gerd!)
>>
>> Rex Abert
>> Associate Professor of Mathematics
>> Tallahassee Community College
>> _______________________________________________
>> LON-CAPA-users mailing list
>> LON-CAPA-users at mail.lon-capa.org
>> http://mail.lon-capa.org/mailman/listinfo/lon-capa-users

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