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Maybe you upgraded your java runtime engine (JRE)? downgrading maybe an option.

Also, after any kernel upgrade I do have problems running comsol. That is because nvidia's driver is a proprietary one and it is not reinstalled along with the new linux kernel. If you happen have an nvidia graphic card and a proprietary driver installed, try to upgrade it or reinstall it.

Do you have debian or any debian-based distribution? try running this command glxgears and tell me what happens.

hope it helps,
Felipe BM

Hi,

Thanks for your fast reply.

No, I didn't do any update, neither on JRE or on kernel or NVIDIA. However, I did reboot my computer before this problem occurred.

After the reboot, when trying to start-up COMSOL 4.3a or 4.4, COMSOL gave "JAVA permission denied" errors and didn't start up. I had this problem before and found on the internet that the following command fixed this:
chcon -t textrel_shlib_t /usr/java/jdk1.6.0_41/jre/lib/i386/client/libjvm.so
(And then the same with a long list of other Java libs)
So, I did this, but also for some JAVA *.so libs that were located in COMSOL4.3 subdirectories.

After that, COMSOL 4.3a started up fine. However, with COMSOL 44, I got the problems as quoted in my first message.

Somehow, my guess is that by doing this "chcon" commands on "COMSOL 4.3 Java libs" (excuse me if I use the wrong terminology here, for me this is all very cryptic), some of the "COMSOL 4.4 java libs" ended up "pointing to the wrong lib" (again, I have no idea whether any of this makes sense).

Since I didn't know how to fix this (it didn't tell which COMSOL 4.4 java libs to fix), I just re-installed COMSOL 4.4 completely. Now, everything works fine. But of course, it would be nice to understand the origins of this problem so that I don't have to reinstall every time this occurs.

I am running Scientific Linux by the way, which is some special variant of RedHat.

Best regards,

Machiel

Hi,

I still have the same problem. Whenever I switch off my computer and then switch it back on, I cannot start up COMSOL44.
After doing "chcon -t textrel_shlib_t /usr/local/comsol44_copy1/java/glnx86/jre/lib/i386/client/libjvm.so", the graphical interface starts up, but then complaints about this:

java.lang.RuntimeException: Could not find the COMSOL Application 'com.comsol.guiclient.application'

When I try to run "glxgears", it runs fine by the way.

The only way I can get COMSOL 44 to work, is to re-install it completely, which is a bit annoying. My guess I have to set some kind of JAVA path, but I have no idea how.

Cheers,

Machiel

Hi
I have the same problem , after running i get this Error msg :
java.lang.RuntimeException: Could not find the COMSOL Application 'com.comsol.guiclient.application'
How can i solve it ?

Regards

I still haven't solved it.
Everytime I have rebooted my computer, I have to reinstall COMSOL 4.4 (With 4.3 I don't have this problem).
It must be something about paths that are set correctly by the installation script.