Alright, lets debug..
Which OS? Which version of CasADi? Are you using CasADi thorugh Python/Matlab/C ?
If Python, which environment (command line/spyder/...)?

Hi!
I use Ubuntu 16.04, more precisely:

Distributor ID: Ubuntu
Description: Ubuntu 16.04.2 LTS
Release: 16.04
Codename: xenial

I got CasADi 3.2.0 for matlab 2014b (I use matlab 2016b). Thus far I tried both a compiled version of the HSL release, and the sources which I compiled myself following instructions.

Is CasADi built or from the binaries?

Could you provide the output of the following commands?
bash: ldd <coinhsl_build>/lib/libhsl.so
matlab: getenv('LD_LIBRARY_PATH')

CasADi is from the binaries, I did attempt to compile one, but was unable to determine correct flags

The bash output is as follows:

asavchen@syst28 lib$ ldd libhsl.so 
	linux-vdso.so.1 =>  (0x00007ffc010eb000)
	liblapack.so.3 => /usr/lib/liblapack.so.3 (0x00007f6df0c64000)
	libgfortran.so.3 => /usr/lib/x86_64-linux-gnu/libgfortran.so.3 (0x00007f6df0938000)
	libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f6df062f000)
	libgomp.so.1 => /usr/lib/x86_64-linux-gnu/libgomp.so.1 (0x00007f6df040d000)
	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f6df0042000)
	libblas.so.3 => /usr/lib/libblas.so.3 (0x00007f6defdd3000)
	libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f6defbbd000)
	libquadmath.so.0 => /usr/lib/x86_64-linux-gnu/libquadmath.so.0 (0x00007f6def97d000)
	/lib64/ld-linux-x86-64.so.2 (0x000056267d60e000)
	libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f6def779500)
	libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f6def55c000)

The matlab output is

getenv('LD_LIBRARY_PATH')
ans =
/apps/matlab/sys/os/glnxa64:/apps/matlab/bin/glnxa64:/apps/matlab/extern/lib/glnxa64:/apps/matlab/runtime/glnxa64:/apps/matlab/sys/java/jre/glnxa64/jre/lib/amd64/native_threads:/apps/matlab/sys/java/jre/glnxa64/jre/lib/amd64/server

So, the LD_LIBRARY_PATH in matlab looks completely different from the one that is shown when I check in bash
echo $LD_LIBRARY_PATH

Right, so looks like matlab is ignoring your environment.
Let's hack it in to see if that's the issue:
start your matlab from command line, from the terminal where you did the LD_LIBRARY_PATH export.
e.g. matlab may work as a command or you may need to specify the full path e.g. /usr/local/bin/matlab

Wow, that worked! Why haven't I thought of trying that?.. :)
The export is written in .bashrc, so I thought it's supposed to be loading when I login, i.e. the echo command works all the time.

Thanks for the help, it was driving me nuts for days!

np I'll put up a notice in our wiki..

There must be a more proper way that doesn't require starting Matlab from command line, though. Do report it in case you find it

Was there ever a new solution to this? The command line method worked but wouldnt mind something that addresses the problem...

Hi, could you please tell me which version of MA57 you used? I have the ma57-3.10.0 and i don't know how you set the symbolic link because i don't have the file libcoinhsl.so as you have. I have the following files :
libma57.so.0.0.0
libma57.so.0
libma57.so
libma57.la
libma57.a
libfakemetis.so.0.0.0
libfakemetis.so.0
libfakemetis.so
libfakemetis.la
libfakemetis.a

i tried to create a symbolic link with the libma57.so files but i get the same crash of matlab all the time. If you need more details about my setup i would gladly write you a PM.

Kind regards