Okay. It was:

deb http://build.openmodelica.org/apt quantal stable

and now I switch to

deb http://build.openmodelica.org/apt quantal nightly

.
Running

sudo apt-get install openmodelica

it gives this:

Err http://build.openmodelica.org/apt/ quantal/nightly omnotebook i386 18855-1
  404  Not Found

and

Failed to fetch http://build.openmodelica.org/apt/pool/ … 1_i386.deb  404  Not Found

I have checked also on your server and on contrib-quantal there is no 18855 version.

Besides, I can see that the nightly distribution has 18855 revision and not 19****.

That's how I got it in the first place. I have followed the instructions from here:

https://openmodelica.org/index.php/download/download-linux

but I got the old version. How do I install the new version by using apt-get?

The omc I was running from /usr/bin/ on filesystem. If I print the libraries, I get, among other standard ones, this:

hp@hp-hp-xw6600-workstation:/usr/bin$ ldd /usr/bin/omc



    linux-gate.so.1 =>  (0xb77b4000)

    libModelicaExternalC.so.0 => /usr/bin/../lib/omc/libModelicaExternalC.so.0 (0xb77aa000)

    libOpenModelicaRuntimeC.so => /usr/bin/../lib/omc/libOpenModelicaRuntimeC.so (0xb771b000)

If I try to run omc, I get this:

./omc: error while loading shared libraries: libfmilib_shared.so: cannot open shared object file: No such file or directory

Okay! I've done that. Now I cannot open it anymore. I use

sudo ln extraction_folder/usr/bin/omc-bootstrapped /usr/bin/omc

and first it says that it already exists. Then I overwrite it and now I have another error:

Unable to find OMEdit server, Object reference file

/tmp/OpenModelica/OMEdit/openmodelica.hp.objid.OMEdit102a213dc3ea79534139211174235202500000021250077104222396 not created.

OMEdit will close.

Thank you for your answer. Now I have another problem. I am trying to install the new version from here

https://build.openmodelica.org/tar-xz/-> openmodelica-i386-19024.tar.xz

but when I extract it and go to /usr/bin/OMEdit, it runs but it says that the revision is still this one: 17628. What should I do in this case?

I use: 17628

Oh, and I receive this when the program crashes:

OMEdit crashed with SIGSEGV in QMdiArea::resizeEvent()

Sometimes when I write some code lines and I am trying to save the model, OM stops responding and therefore I have to kill it. I am using OM on Ubuntu.

Did anybody encounter such problem before?