OK, again, python script is successfully created/written, and it is
runnable outside of GRC, the errno13 comes from execve call which is
incomplete, can you see that, please?

On Jul 7, 2017 01:27, "Cinaed Simson" <cinaed.sim...@gmail.com> wrote:

> On 07/06/2017 02:57 PM, Jozef Lošonský wrote:
> > I'm not behind my pc, but I think that it is possible to understand my
> > issue, that py file is generated from any flowgraph OK, but "play
> > button" press fails with Errno13 when "No GUI" (of course I'm not using
> > any WX or QT block in such case).
>
> Without at least an error message, e.g., Errno13, it's impossible to
> figure out what the problem is since your explanations make no sense.
>
> In fact, you've never indicated there was an error message.
>
> Typically, an Errno13 is a write permission problem - it's not a
> gnuradio or grc problem.
>
> And the error should have included
>
>   Generate Error: [Errno 13] Permission denied:
>
> and then it prints out the location of where you're writing to.
>
> The obvious solution is to find another play to write the file.
>
> -- Cinaed
>
>
> >
> > On Jul 6, 2017 11:48 PM, "Cinaed Simson" <cinaed.sim...@gmail.com
> > <mailto:cinaed.sim...@gmail.com>> wrote:
> >
> >     On 07/06/2017 02:14 PM, Jozef Lošonský wrote:
> >     > Hi, there are no GUI elements and graf generated py file works
> >     fine from
> >     > console, but GRC only is unable to execute that already generated
> >     file.
> >
> >     Then post the flowgraph and the python code - it's the only way we
> can
> >     help you.
> >
> >     -- Cinaed
> >
> >     >
> >     > On Jul 6, 2017 11:08 PM, "Cinaed Simson" <cinaed.sim...@gmail.com
> >     <mailto:cinaed.sim...@gmail.com>
> >     > <mailto:cinaed.sim...@gmail.com <mailto:cinaed.sim...@gmail.com>>>
> >     wrote:
> >     >
> >     >     On 07/06/2017 12:10 AM, Jozef Lošonský wrote:
> >     >     > Hello,
> >     >     > my GRC is unable to execute graphs (no GUI elements) when I
> >     switch
> >     >     > option to No GUI, everything else seems to be working.
> >     >
> >     >     The option "No GUI" means no GUI elements, i.e., no graphs.
> >     >
> >     >     If you had a graphical element in your flowgraph, GRC should
> have
> >     >     complained and printed an error message in the GRC console
> >     when you
> >     >     clicked on the button "Generate the flow graph".
> >     >
> >     >     In order to generate python code from GRC you have disable the
> GUI
> >     >     elements in the flowgraph in order to generate python code.
> >     >
> >     >     > In addition "No
> >     >     > GUI" py script (generated by same GRC) is running fine in
> >     console
> >     >     of the
> >     >     > same user which is running GRC what is interesting.
> >     >
> >     >     I didn't find other
> >     >     > way how to try get more info about issue than run whole GRC
> >     under
> >     >     strace
> >     >     > -ffy and read the strace file.
> >     >     > Comparing strace files with working GRC instance on another
> PC
> >     >     @jcorgan
> >     >     > did suggest that in execve python is missing.
> >     >
> >     >     And most likely the gnuradio software and the required
> >     software packages
> >     >     needed to run gnuradio on PC @jcorgan are probably missing too.
> >     >
> >     >     A working installation of python is one of the perquisite to
> run
> >     >     gnuradio.
> >     >
> >     >     >
> >     >     > Bad:
> >     >     > [pid  2704] execve("/usr/local/bin/", ["", "-e",
> >     "/usr/bin/python",
> >     >     > "-u", "/home/pi/top_block.py"]...= -1 EACCES (Permission
> denied)
> >     >     > Good:
> >     >     > [pid 12112] execve("/usr/bin/python", ["/usr/bin/python",
> "-u",
> >     >     > "/home/loso/top_block.py"], [/* 75 vars */] <unfinished ...>
> >     >     >
> >     >     > I'm trying to find which env variable or what option am I
> >     missing/have
> >     >     > wrongly configured in GRC config or somewhere else.
> >     >     Based on the content of this post, everything on your machine
> >     is working
> >     >     correctly.
> >     >
> >     >     If you can actually generate an error message using gnuradio -
> >     other
> >     >     then enclosed operator errors - post the error message, the
> >     flowgraph
> >     >     and the python code.
> >     >
> >     >     >
> >     >     > Thank you.
> >     >     > Jozef
> >     >     >
> >     >     >
> >     >     >
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> >     >
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