SOLVED : Graphical interface Matlab not working

HPC Technical
1

Hello everyone.

This may be related to the migration Centos6–>Centos7 but i cannot access the Matlab graphical interface on login1 (login 2 does not work for me, issue pending in another topic).
I got allocated a node

salloc -n1 -c 12 --partition=mono-shared --time=10:00:00 srun -n1 -N1 --pty $SHELL
salloc: Pending job allocation 16714523
salloc: job 16714523 queued and waiting for resources
salloc: job 16714523 has been allocated resources
salloc: Granted job allocation 16714523

However, when I try to start Matlab on another terminal (as it used to work before)

[benis@login1 ~]$ ssh -Y node192
Last login: Fri May 17 12:47:36 2019 from login1.cluster
Installed: Fri May 3 16:37:50 CEST 2019
[benis@node192 ~]$ module load matlab
[benis@node192 ~]$ matlab &

I get an error:

X11 connection rejected because of wrong authentication.
MATLAB is selecting SOFTWARE OPENGL rendering.
X11 connection rejected because of wrong authentication.

It is then stuck and matlab never starts.
Is there a way to solve this problem ?

Thank you for your replies

2

Update:
I succeeded to login at login2
Now i get

[benis@node184 ~]$ module load matlab
[benis@node184 ~]$ matlab &
[1] 87813
[benis@node184 ~]$ MATLAB is selecting SOFTWARE OPENGL rendering.
Fatal Internal Error: Unexpected exception: ‘N5boost16exception_detail10clone_implINS0_39current_exception_std_exception_wrapperISt13runtime_errorEEEE: Bundle#5 start failed: libXt.so.6: cannot open shared object file: No such file or directory’ in createMVMAndCallParser phase ‘Creating local MVM’
^C
Any suggestions?

Best
Damien

3

Dear Damien,

for the issue with login2 and Matlab, there is a workaround:

module load foss/2016a libXt/1.1.5 matlab/2018b
4

Dear Damien,

we will check that issue. It’s not related to CentOS7 as login1 and node192 are in CentOS6.

Best

5

Hi there,

This has now been fixed globably, so no more workaround needed on CentOS 7.

Sorry for the inconvenience.

Thx, bye,
Luca

6

Hi there,

The original issue (thus MATLAB in graphical interface not working on CentOS 6 nodes) has now been fixed as well.

Sorry for the inconvenience.

Thx, bye,
Luca

7

Thank you very much

Best

Damien