No traceback with error message (4.0.0-rc3, Windows 7 64bit)

[Martin Kunz]

Hi,

One thing that complicates using Octave 4.0.0-rc3 on my computer is that
no traceback messages are printed when an error occurs. Consider a
simple testScript.m with the following content:

a=1;
a(2);

When I run this script with Octave 3.8.2 I get:

 >> testScript
error: testScript: A(I): index out of bounds; value 2 out of bound 1
error: called from:
error:   D:\scripting\octave\octaveScripts\testScript.m at line 2, column 1

However, Octave 4.0.0-rc3 prints:

 >> testScript
error: testScript: A(I): index out of bounds; value 2 out of bound 1

and no traceback. Is there a switch to activate the traceback?
I used http://alpha.gnu.org/gnu/octave/octave-4.0.0-rc3-installer.exe to
get Octave.

Thanks for your help,
Martin