Re: [LabPython-Users] LabPython with rpy problem

[Christian C. <chr...@em...>]

Thanks it works..

On Mon, 20 Oct 2008 20:11:51 +0200, Rolf Kalbermatter  
<r.k...@hc...> wrote:

> Hello Christian,
>
>> I tried to use rpy through labpyhton. But the enclosed
>> rpy_simple.vi allows just one execution. It's not possible to
>> rerun rpy a second time without a restart of LabView. It
>> seems that LabPython doesn't clean/close/disconnect correctly
>> after executing once.
>>
>> I have installed:
>>
>> LabPyton 1.2.2 (LabPython is part of OpenG lib for LabView)
>> numpy 1.2.0-win32 ActivePython 2.5.2.2-win32x86 (in order to
>> get rpy using Mark Hammond's py
>> extensions)
>> rpy-1.0.3-R-2.7.0-win32-py2.5.exe
>> Python 2.5.2
>> R 2.7.0
>> LabView 2.5
>
> I'm not sure about the exact interactions here and why this happens but  
> am
> currently not working with Python nor do I have time to look into  
> LabPython.
>
> Workaround is to not close the Python session but instead just open it  
> once
> in the beginning and then keep it open, optionally setting a new  
> expression,
> and then executing that expression repeatedly using the same session.
>
> And you are right LabPython does not close completely from the python  
> kernel
> once it connects. It does however clean all resources it allocated but  
> that
> might be not enough in case of external modules that might expect some
> special throw out of memory after use.
>
> LabVIEW restarting shouldn't really be necessary as it should be enough  
> to
> close all LabVIEW VIs making use of LabPython. If that is not enough the
> issue is even more obscure than I would expect.
>
> Rolf Kalbermatter
>
>
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Christian Conrad
European Molecular Biology Laboratory
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