/usr/lib/AMC/exec/AMC-detect: error while loading shared libraries: libopencv_highgui.so.2.4: cannot open shared object file: No such file or directory

Can you check that the file libopencv_highgui.so.2.4 is present somewhere on your system?

locate libopencv_highgui.so

Hi,

indeed, it seems that those libraries have been recently updated. I get the following addresses :
/usr/lib/x86_64-linux-gnu/libopencv_highgui.so.3.2
/usr/lib/x86_64-linux-gnu/libopencv_highgui.so.3.2.0

This means that Neon ships OpenCV3.2, when Ubuntu Xenial ships OpenCV2.4.
The package auto-multiple-choice you installed (from the PPA I guess) is build for Xenial, against OpenCV2.4. So you have to rebuild AMC with your current OpenCV version…

OK. I will do it.

Thanks a lot !

Works well now !

For information :

Installation of the libraries :
libcv-dev libcvaux-dev libhighgui-dev libpango1.0-dev libcairo2-dev libjpeg-dev libgif-dev libpoppler-glib-dev librsvg2-bin dblatex

then
package auto-multiple-choice_1.3.0_sources.tar.gz downloaded from :
https://www.auto-multiple-choice.net/download.fr

on the uncompressed folder:
make ; sudo make install

A Matynia wrote:

Works well now !

For information :

Installation of the libraries :
sudo apt install libcv-dev libcvaux-dev libhighgui-dev libpango1.0-dev libcairo2-dev libjpeg-dev libgif-dev libpoppler-glib-dev librsvg2-bin dblatex

then
download package auto-multiple-choice_1.3.0_sources.tar.gz downloaded from :
https://www.auto-multiple-choice.net/download.fr

on the uncompressed folder:
make ; sudo make install

Hello:

Those instructions are not working for me in ubuntu 18.04.

First, I had to install alternatives suggested by apt

sudo apt install libopencv-dev  libpango1.0-dev libcairo2-dev libjpeg-dev libgif-dev libpoppler-glib-dev librsvg2-bin dblatex

Then I got some errors building the documentation, so I installed texlive-lang-all.

Now I get an error like: "cannot parse http://docbook.sourceforge.net/release/xsl/current/manpages/docbook.xsl", so I installed

sudo apt install docbook-xsl

and now I am stuck with this other error:

Output written on sample-separate.pdf (60 pages, 232610 bytes).
Transcript written on sample-separate.log.
../../reproducible-pdf.pl --id sample-separate.pdf
Error: Unable to find file.
Error: Failed to open PDF file: 
   /tmp/UO-jquAvt
Errors encountered.  No output created.
Done.  Input errors, so no output created.
pdftk compress error: Bad file descriptor at ../../reproducible-pdf.pl line 69.
Makefile:44: recipe for target 'sample-separate.pdf' failed
make[2]: *** [sample-separate.pdf] Error 9
rm sample-separate.datetex.in sample-separate.datetex
make[2]: se sale del directorio '/home/xxx/extra/software/auto-multiple-choice-1.3.0/doc/sty'
Makefile:27: recipe for target 'all' failed
make[1]: *** [all] Error 2
make[1]: se sale del directorio '/home/xxx/extra/software/auto-multiple-choice-1.3.0/doc/sty'
Makefile:145: recipe for target 'doc' failed
make: *** [doc] Error 2

I do have pdftk installed, but there is no deb package, only a snap, for ubuntu 18.04.
It's funny, since sample-separate.pdf seems to be perfectly fine.

That error were for version 1.3.

With version 1.4.0rc2, I get no errors, but it doesn't recognize the scans... (sure, it was compiled with a different version!)

ok, I finally got it working properly,except I get a warning that only auto-multiple-choice-common is installed,and it will not work, but everything does work fine, after a little bit of tuning.

Have a nice day!

After experienced similar problems, I solved with two steps.

Update AMC to version 1.4.0rc2 and (very important) changed Imagemagick to Graphicsmagick.

With Imagemagick, it did not recognize the scans; no problem after replacing it to Graphicsmagick.

BTW: I use both Ubuntu and Mint.

Congratulations for this wonderful software.

Fabio