Re: [Gnuplot-info] How to ignore "popen failed"?

[Tatsuro M. <tma...@ya...>]

----- Original Message -----
> From: theozh <th...@gm...>
> To: Tatsuro MATSUOKA <tma...@ya...>; gnu...@li...
> Cc: 
> Date: 2017/7/28, Fri 18:33
> Subject: Re: [Gnuplot-info] How to ignore "popen failed"?
> 
>>  What happens you execute the script on wgnuplot_pipes.exe?
>> 
> Thanks, Tatsuro, for that hint. Haven't tried so far.
> Well, then it also seems to work :-).
> So, problem solved...?!
>

Bastian relied in the bug ticket
https://sourceforge.net/p/gnuplot/bugs/1950/

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This is a bug or shortcoming of the "fake" pipe emulation. 
If the command interpreter cannot execute a command, it returns 1. 
Currently gnuplot interprets this return value as such and fails. 
Of course 1 can also be a valid return code by a (more-or-less) successful command, 
which is the case here. 
A simple work-around (on wgnuplot.exe) is to force a return value of zero:

flist=system('cmd /c "dir /B *.dat & exit 0"') 
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Tatsuro