strcat error on printing plots

[John W. Eaton]

On 21-Jul-2009, Marco Atzeri wrote:

| unfortunately no change:
| 
| *********************************************************
| 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 help at octave.org
| mailing list.
| warning: __gnuplot_get_var__: some elements in list of return values are undefined
| ***************************************************************

Try

  debug_on_error (true);

Then execute your print commands.  You should get a "debug> " prompt.
Then you can use "dbstack" to show you where the error occurred.
Maybe that will give you some clues about what is happening.

| however checking the memory consumption I suspect some 
| leakage memory issue..
| 
| After octave start I have 
| 
| 21664 K used memory as working set
| a="prova.png";  
|  21668 K
| x=1:100; 
|  21684 K
| plot (x,x);
|  62420 K
| print( "prova1.png","-dpng");
|  62432 K
| 
| every successive print command increase the memory 
| foot print of 8K until it crash
| sometime is only after few trials sometime I reached
| 12 print's before crash.
| 
| Only the print is causing such memory increase,
| if I repeat the plot or the assigment the memory 
| consumption stay flat.

There may be a leak, but that looks small, so it doesn't seem that it
would be enough to cause Octave to use all of your available memory in
just a few calls to print.

jwe