fortran runtime error: end of record

[Landau1908]

Hey, Thomas

I have modified the error, using m.twiss() instead of pm.twiss(), but another error occurs.

C:\Users\Administrator>e:

E:\>cd E:\pymad\test

E:\pymad\test>python 2.py

  ++++++++++++++++++++++++++++++++++++++++++++
  +     MAD-X 5.02.02  (32 bit, Windows)     +
  + Support: mad@cern.ch, http://cern.ch/mad +
  + Release   date: 2014.07.04               +
  + Execution date: 2014.08.11 00:26:02      +
  ++++++++++++++++++++++++++++++++++++++++++++
enter Twiss module
Fortran runtime error: End of record
Traceback (most recent call last):
  File "2.py", line 11, in <module>
    twiss, summary = m.twiss()
  File "D:\Program Files\python\lib\site-packages\cern_cpymad-0.8-py2.7-win32.eg
g\cern\cpymad\model.py", line 382, in twiss
    use=use)
  File "D:\Program Files\python\lib\site-packages\cern_cpymad-0.8-py2.7-win32.eg
g\cern\cpymad\madx.py", line 265, in twiss
    **twiss_init)
  File "D:\Program Files\python\lib\site-packages\cern_cpymad-0.8-py2.7-win32.eg
g\cern\cpymad\madx.py", line 113, in __call__
    self.__dispatch(_madx_tools.mad_command(*args, **kwargs))
  File "D:\Program Files\python\lib\site-packages\cern_cpymad-0.8-py2.7-win32.eg
g\cern\cpymad\madx.py", line 167, in input
    self._libmadx.input(text)
  File "D:\Program Files\python\lib\site-packages\cern_cpymad-0.8-py2.7-win32.eg
g\cern\cpymad\_libmadx_rpc.py", line 404, in DeferredMethod
    funcname, args, kwargs)
  File "D:\Program Files\python\lib\site-packages\cern_cpymad-0.8-py2.7-win32.eg
g\cern\cpymad\_libmadx_rpc.py", line 247, in _request
    return self._dispatch(self._conn.recv())
  File "D:\Program Files\python\lib\site-packages\cern_cpymad-0.8-py2.7-win32.eg
g\cern\cpymad\_libmadx_rpc.py", line 165, in recv
    return pickle.load(self._recv)
EOFError
Exception IOError: IOError(22, 'Invalid argument') in <bound method LibMadxClien
t.__del__ of <cern.cpymad._libmadx_rpc.LibMadxClient object at 0x028D0250>> igno
red

E:\pymad\test>

[coldfix]

Hey,

this is an error inside MAD-X not inside pymad. On my machine the lhc machine works without problems.

My first guess is that there is something wrong with the revision you downloaded. The CERN guys do NOT care to break the upstream latest revision. Maybe you want to fallback to the latest development release and check whether the error persists. See also the updated installation docs.

If your problem persists with the last development release (which is not the latest revision), you should contact MAD-X support, as you should generally do for all MAD-X errors. I am not affiliated in any way with MAD-X development and I don't know anything about it's internals.

Remember not to post any pymad code to them, but rather create a minimalistic example with only MAD-X commands. The load_model function has a parameter to create a history file that will be useful for this purpose.

[coldfix]

Before I close this issue:

• has your problem been solved by downgrading to the development release?
• did you try to use the madx.exe of the same revision that produced the error, pass to it the history file and see if it yields an error?

(There is a small chance, that this is in fact a problem in the way that pymad uses MAD-X.)

[Landau1908]

1.Maybe Yes. I have succeeded in finishing installation on my other computer. I guess I made something wrong in the setup steps when installed on my current computer. I will try to install from the begining, and I will tell you if there exist any errors that I cann't be able to deal with.

2.Using madx.exe is my next plan, and maybe I begin it after few days.

b.t.w. my major is accelerator physics, so I will always be in trouble when happened these problems as before.

[coldfix]

Closing this, based on the assumption that this is not a pymad problem.