Re: strcat error on printing plots

[Ben Abbott]

On Tuesday, July 21, 2009, at 07:22AM, "Marco Atzeri" <address@hidden> wrote:
>--- Mar 21/7/09, Ben Abbott <address@hidden> ha scritto:
>
>> Da: Ben Abbott <address@hidden>
>> Oggetto: Re: strcat error on printing plots
>> A: "Marco Atzeri" <address@hidden>
>> Cc: "octave maintainers list" <address@hidden>
>> Data: Martedì 21 luglio 2009, 12:55
>> 
>> On Jul 21, 2009, at 3:06 AM, Marco Atzeri wrote:
>> 
>> > --- Lun 20/7/09, Ben Abbott <address@hidden>
>> ha scritto:
>> >
>> >> Da: Ben Abbott <address@hidden>
>> >> Oggetto: Re: strcat error on printing plots
>> >> A: "Marco Atzeri" <address@hidden>
>> >> Cc: "octave maintainers list" <address@hidden>
>> >> Data: Lunedì 20 luglio 2009, 18:26
>> >> On Jul 20, 2009, at 6:54 AM, Marco
>> >> Atzeri <address@hidden>
>> >> wrote:
>> >>
>> >>> Dear all,
>> >>> using 3.2.0 on cygwin and printing enough
>> plots
>> >>>
>> >>> a="prova..png";
>> >>> x=1:100;
>> >>> plot (x,x)
>> >>> print( "prova1.png","-dpng")
>> >>> print( "prova2.png","-dpng")
>> >>> print( "prova3.png","-dpng")
>> >>> print( "prova4.png","-dpng")
>> >>> print( "prova5.png","-dpng")
>> >>> print( "prova6.png","-dpng")
>> >>> print( "prova7.png","-dpng")
>> >>>
>> >>>
>> >>> I obtain the following multiple message
>> >>>
>> >>> ********************************************
>> >>> error: Invalid call to strcat.  Correct
>> usage
>> >> is:
>> >>>
>> >>> -- Function File:  strcat (S1, S2, ...)
>> >>>
>> >>>
>> >>> Additional help for built-in functions and
>> operators
>> >> is
>> >>> available in the on-line version of the
>> manual.
>> >> Use the command
>> >>> `doc <topic>' to search the manual
>> index.
>> >>>
>> >>> Help and information about Octave is also
>> available on
>> >> the WWW
>> >>> at http://www.octave.org and via the address@hidden
>> >>> mailing list.
>> >>> warning: __gnuplot_get_var__: some elements in
>> list of
>> >> return values
>> >>> are undefined
>> >>>
>> >>
>> *******************************************************
>> >>>
>> >>> Is this fault happening also on other platform
>> ?
>> >>>
>> >>> I presume some replot cleaning problem in
>> >>>
>> >>> /usr/share/octave/3.2.0/m/plot/print.m
>> >>>
>> >>> but eventually is a strcat issue
>> >>>
>> >>> Thanks
>> >>> Marco
>> >>
>> >> Do you get the same error when you type ...
>> >>
>> >> figure (1)
>> >> __gnuplot_get_var__ (gcf, "GPVAL_TERMINALS")
>> >>
>> >
>> > Hi Ben,
>> > no, the output in this case is
>> >
>> > ans = NaN
>> >
>> > The fault I have is never on the plot command but
>> always
>> > when I call print enough times (usually at the third
>> or forth
>> > call).
>> 
>> Do you run those commands from a script or by pasting them
>> into the  
>> command window?
>> 
>> Ben
>
>The fault arrive earlier if I ran a script, but also
>pasting the command I can obtain it.
>Any suspect ?
>
>Marco

There aren't many instances of strcat what are only called when printing. So it 
shouldn't be so difficult to isolate the problem. Unfortunately, I don't see 
this error when printing.

If you're willing, please try commenting out each instance of the lines below 
in print.m

    unwind_protect

    unwind_protect_cleanup

    end_unwind_protect

The characters "%" or "#" may be used to comment them out ...

#    unwind_protect

#    unwind_protect_cleanup

#    end_unwind_protect

If you then run your commands, the error should provide more information.

Ben