Re: [Discuss-gnuradio] GRC [Errno 13] Permission denied for No GUI graphs

[Cinaed Simson]

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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