[Scilab-users] Using "spec" with "parallel_run"

[Eduardo Martini]

Hi,
I am running several simulation in which I have to get eigenvalues several times: the process seems to be easy to paralelize as any calculation is independent from the others.
How ever I am getting errors when using "parallel_run" : 
I manage to create a simple example of the problem:
"function output=ThisFunctionDoesWork(i)    eig_values = spec(rand(10,10));
    output = (1:10)';
endfunction

function output=ThisFunctionDoesNOTWork(i)
    eig_values = spec(rand(10,10));
    output = eig_values; 
endfunction

ThisFunctionDoesWork(1)
ThisFunctionDoesNOTWork(1)

parallel_run(1:4,ThisFunctionDoesWork,10)
parallel_run(1:4,ThisFunctionDoesNOTWork,10)"
 I get the following output:

">ThisFunctionDoesWork(1)
 ans  =
 
    1.   
    2.   
    3.   
    4.   
    5.   
    6.   
    7.   
    8.   
    9.   
    10.  
 
-->ThisFunctionDoesNOTWork(1)
 ans  =
 
    4.6702874               
    0.5256414 + 0.5235705i  
    0.5256414 - 0.5235705i  
    0.1415384 + 0.6023968i  
    0.1415384 - 0.6023968i  
  - 0.5172448 + 0.4635569i  
  - 0.5172448 - 0.4635569i  
    0.1193317               
  - 0.3188852 + 0.0144623i  
  - 0.3188852 - 0.0144623i  
 
-->parallel_run(1:4,ThisFunctionDoesWork,10)
 ans  =
 
    1.     1.     1.     1.   
    2.     2.     2.     2.   
    3.     3.     3.     3.   
    4.     4.     4.     4.   
    5.     5.     5.     5.   
    6.     6.     6.     6.   
    7.     7.     7.     7.   
    8.     8.     8.     8.   
    9.     9.     9.     9.   
    10.    10.    10.    10.  
  ->parallel_run(1:4,ThisFunctionDoesNOTWork,10)
                                             !--error 42 
A fatal error has been detected by Scilab.
Your instance will probably quit unexpectedly soon.
If a graphic feature has been used, this might be caused by the system graphic drivers.
Please try to update them and run this feature again.
You can report a bug on http://bugzilla.scilab.org/ with:
* a sample code which reproduces the issue
* the result of [a, b] = getdebuginfo()
* the following information:
[emartini-Dell-System-Inspiron-N4110:31486] Signal: Segmentation fault (11)
[emartini-Dell-System-Inspiron-N4110:31486] Signal code: Address not mapped (1)
[emartini-Dell-System-Inspiron-N4110:31486] Failing at address: (nil)
 
Call stack:
   1: 0x8bb2f9 <JVM_handle_linux_signal>        (/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/amd64/server/libjvm.so)
   2: 0x8af1f8 < >                              (/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/amd64/server/libjvm.so)
   3: 0x11390  < >                              (/lib/x86_64-linux-gnu/libpthread.so.0)
   4: 0x9ec90  < >                              (/lib/x86_64-linux-gnu/libc.so.6)
   5: 0x2eba   < >                              (/usr/lib/scilab/libsciparallel.so)
   6: 0x495e   <sci_parallel_run>               (/usr/lib/scilab/libsciparallel.so)
   7: 0x21ba   <gw_parallel>                    (/usr/lib/scilab/libsciparallel.so)
   8: 0x1586a2 <callDynamicGateway>             (/usr/lib/scilab/libscilab-cli.so.0)
   9: 0x15d26b <gw_dynamic_generic>             (/usr/lib/scilab/libscilab-cli.so.0)
  10: 0x158af8 <callinterf_>                    (/usr/lib/scilab/libscilab-cli.so.0)
  11: 0x16c266 <scirun_>                        (/usr/lib/scilab/libscilab-cli.so.0)
  12: 0x1671aa <realmain>                       (/usr/lib/scilab/libscilab-cli.so.0)
  13: 0x14d5   < >                              (/usr/bin/scilab-bin)
  14: 0x20830  <__libc_start_main>              (/lib/x86_64-linux-gnu/libc.so.6)
  15: 0x1829   < >                              (/usr/bin/scilab-bin)
End of stack


 
                                             !--error 999 
Aborting current computation
 
 "


I am lost... I can even "disp" the eig_values, but no luck in having them as output variables.I am doing something wrong?
Thanks a lot for any help! ;)
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.scilab.org/pipermail/users/attachments/20161220/fbf73f48/attachment.htm>