[mcstas-users] two problems with 2.0RC2

[Peter Kjær Willendrup]

Hi Evgeny,

On Dec 20, 2012, at 13:49 , Evgeny Moskvin <emoskvin at lns.pnpi.spb.ru<mailto:emoskvin at lns.pnpi.spb.ru>> wrote:

In regard to the Tk package - a new one built on Snow Leopard including Tk::CodeText is now available here:

http://mcstas-20rc2.mcstas.org/MacOS/10.6_Snow_Leopard/Tk-804_030_MacOSX_10_6_Perl_5_8_9.pkg.zip

it works, thank you!
But another problem appeared. It happens at some point during "sim-edit-sim... etc" iterations. Suddenly the run menu appears without parameters list, and the log is:

[emoskvin:17843] *** Process received signal ***
[emoskvin:17843] Signal: Segmentation fault (11)

Ouch - doesn't sound good… Try if the official 2.0 is any better?

It happens not only with my own files, but also with mcstas examples. And of corse it's not possible to start simulations, because if you press "run" button (in gui), the system waits for user to enter parameters in the back (terminal window which is not available for typing in it). Restarting mcgui helps with build in examples, but doesn't with my file.
I tried to run without gui by

mcrun H2_D2.instr

doesn't work either, the error message is

Traceback (most recent call last):
  File "/usr/local/bin/mcrun", line 9, in <module>
    from mcstas import McStas
  File "/usr/local/lib/mcstas-tools-python-mcrun-2.0RC2/mcstas.py", line 6, in <module>
    import yaml
ImportError: No module named yaml

This means the Python mcrun is missing yaml - try getting it like this in a terminal:

sudo easy_install pyyaml

Alternatively the mccode-select command can be used to define the "default" mcrun to be the perl one, using:

mccode-select --install mcrun 2.0RC2

Hope my explanations are clear (more or less)... So, what would be a problem?

You need to use the "environment" script that was also created in /tmp to enable a "mcstas 1.12c

I did run this script right after migration process, and it was fine. So now it's in /usr/local/bin and when I run mcgui after this script in terminal, it starts old gui with new engine:

mcstas-2.0RC2 version 2.0RC2 (Dec. 02, 2012)
Copyright (C) Risoe National Laboratory, 1997-2010
Additions (C) Institut Laue Langevin, 2003-2010
All rights reserved
Plotters: PGPLOT/McStas HTML VRML
Warning: No MPI/grid machine list. Running locally.
  Define /Users/emoskvin/.mcstas/hosts
  or /usr/local/lib/mcstas-1.12c/tools/perl/hosts
  or use option --machines=<file>
Clustering methods: Single MPI Grid

and in my case "run menu" doesn't have parameters list as described above.
So, I'm stacked….

Sounds like a mix between the 1.12c and 2.0 still… Have a look if your 1.12c is in /usr/local/lib/mcstas-1.12c with bin and lib subfolders? In that case it should be safe to remove the mcgui mcplot etc commands in /usr/local/bin and afterwards reinstall the new packages…

Best,

Peter

Peter Kjær Willendrup
Development engineer

DTU Physics





Technical University of Denmark



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Department of Physics
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pkwi at fysik.dtu.dk<mailto:pkwi at fysik.dtu.dk>



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