Re: Counld not able to run Data display debugger

[Bob Proulx]

manish rai wrote:
> My name is manish, and i am also developer in UNIX system. when i am
> trying to use DDD its giving mean error:-
> 
> ddd (Binary Name)
> Error: Can't open display:
> 
> Could you please tell me why is this.

That error literally means that the X Window System display can't be
opened.  But it didn't report a name.  So I assume that the DISPLAY
environment variable is not set.  And if that is not set then I assume
it means that you do not have a graphical display available at that
moment in time.

Try opening another X program.  Try opening "xclock".

  $ xclock

That is a very simple program.  If that works then it proves that you
can open new windows.  If it fails then it proves that there isn't a
problem with ddd but simply with your environment.  Fix that and ddd
will then work fine.

These days most people log into a system using a graphical login
manager and since you are asking this question I assume that you did
too.  The display environment is set up automatically at that time.
If it isn't then very little will work correctly.  Start debugging
your problem there.

Bob