Re: [Swarm-Support] error: TkExtra (instance)

[Matthew E. Gaston]

Sorry to fill up the list . . .

I've written a simple "gui" with tk, and the window opens just fine.  Does
anyone have any other ideas?

Thanks again,
Matt

On Tue, 7 Oct 2003, Matthew E. Gaston wrote:

>
>I've tried setting the DISPLAY to no avail.  Is there an easy way to check
>if tk is able to create a window?
>
>Thanks for your help!
>
>On Fri, 3 Oct 2003, Bill Northcott wrote:
>
>>Here is the same error on MacOS X:
>>[PBG4-12BN:apps/objc/heatbugs] billn% ./heatbugs
>>error: TkExtra (instance)
>>
>>Abort
>>
>>How does it happen?  Simple - I shut down the X-server.
>>
>>Now this is easy on a Mac which does not use X-windows for its display,
>>but rather hard on a Linux box unless you are in CLI mode.
>>
>>The only way I could see that you achieve the effect on Linux is if you
>>are invoking the program in an environment where DISPLAY is not defined.
>>Try
>>echo $DISPLAY
>>
>>You chould get something like
>>:0.0
>>or
>>localhost:0.0
>>
>>If you get nothing, try setting the DISPLAY variable.
>>
>>There could be some other reason that tk cannot create a window on your
>>display.  Permissions possibly.
>>
>>Bill Northcott
>>
>>address@hidden wrote on 03/10/2003 04:20:18 AM:
>>
>>> All,
>>
>>> I've seen this error discussed in the archive, but am having some
>>trouble
>>> finding the solution.
>>
>>> I've (successfully?) installed swarm on Redhat 9, kernel 2.4.20-18.9,
>>with
>>> gcc 3.2.1.  Using the tutorial to test swarm, all simpleBug's work until
>>> the gui's are introduced (simpleObserverBug). Then, upon execution I
>>get:
>>
>>> > # ./bug
>>> > error: TkExtra (instance)
>>> >
>>> > Aborted
>>
>>> sometime during the call to initSwarm.  When I run ldd on the
>>executable,
>>> I get the following information related to Tcl/Tk:
>>
>>> libtk8.3.so => /usr/lib/libtk8.3.so (0x40324000)
>>> libtcl8.3.so => /usr/lib/libtcl8.3.so (0x403e2000)
>>> ...
>>> libtk8.2.so => /usr/local/lib/libtk8.2.so (0x405b2000)
>>> libtcl8.2.so => /usr/local/lib/libtcl8.2.so (0x4065d000)
>>
>>> If anyone has any suggestions, I greatly appreciate it!  One note, I do
>>> not have root on the system I am working on . . .
>>
>>> Thanks,
>>> Matt
>>
>>> Matthew E. Gaston
>>> UMBC Department of Computer Science
>>> address@hidden
>>
>>> "Only those who attempt the absurd will achieve the impossible."
>>> -- Einstein
>>>
>>> _______________________________________________
>>> Support mailing list
>>> address@hidden
>>> http://www.swarm.org/mailman/listinfo/support
>>_______________________________________________
>>Support mailing list
>>address@hidden
>>http://www.swarm.org/mailman/listinfo/support
>>
>
>
>Matthew E. Gaston
>UMBC Department of Computer Science
>address@hidden
>http://www.cs.umbc.edu/~mgasto1
>
>"Only those who attempt the absurd will achieve the impossible."
>                                               -- Einstein
>
>_______________________________________________
>Support mailing list
>address@hidden
>http://www.swarm.org/mailman/listinfo/support
>


Matthew E. Gaston
UMBC Department of Computer Science
address@hidden
http://www.cs.umbc.edu/~mgasto1

"Only those who attempt the absurd will achieve the impossible."
                                                -- Einstein