Problem with function questdlg

[Ferialpraktikant TPP]

Hello,

 

I am trying to create a graphical user Interface with octave and Java(loaded the package Java-1.2.9.tar.gz).

 

The functions msgbox, errordlg and inputdlg are working just fine but now I tried to use the function questiondlg:

 

Antwort = questdlg('Wollen Sie eine bestimmte Anzahl von Runden fahren?', 'FRAGE', 'Ja', 'Nein');

 

When I try this I get following error function:

error: Invalid call to questdlg.  Correct usage is:

 -- Function file: P = questdlg (MESSAGE, TITLE)
 -- Function file: P = questdlg (MESSAGE, TITLE, DEFAULT)
 -- Function file: P = questdlg (MESSAGE, TITLE, BTN1, BTN2, DEFAULT)
 -- Function file: P = questdlg (MESSAGE, TITLE, BTN1, BTN2, BTN3,
          DEFAULT)

 

Additional help for built-in functions and operators is
available in the online 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.

 

When I try to Change the function, just giving MESSAGE and TITLE and letting the function produce the Buttons(Yes, No and Cancel) on it`s own I get the following:

 

>> Antwort = questdlg('Wollen Sie eine bestimmte Anzahl von Runden fahren?', 'FRAGE');
error: [java] java.lang.NullPointerException
error: called from
    java_invoke at line 54 column 10
    questdlg at line 92 column 7

 

I have no idea how I can fix this and I couldn`t find any similar problem and a solution for it on the Internet.

 

It would be great if you could help.

 

Many thanks in advance!

 

Eva-Maria Wartha