> When i am trying to debug i get the following errors while debugging >on QNX,  "No symbol "a0f" in current context.
> mi_cmd_var_create: unable to create variable object".
> i also get this warning: "warning: Unable to restore previously >selected frame  ."
> 
> a0f is a variable that is not in this project. I clean build the project >each   time.
> The application has single digit values are assigned to local float variables.
>  I see that while single stepping on the debugger these variables get >NAN   values.
> 
> Why I am getting these errors and warnings?
> How can i eliminate these errors?
> 
> Thanks for your help.
> 

You should post this into the IDE forum.
( include the output of
qconfig
from wtihin a DOS-cmd-shell, when doing so )

That forum is here:

http://community.qnx.com/sf/discussion/do/listTopics/projects.ide/discussion.ide/

my _guess_ is  first to update Your
underlaying QNX630 to service pack 3 level and (or) use an other gdb (gdb-6.7-u7) available here:
 
http://community.qnx.com/sf/frs/do/viewSummary/projects.toolchain/frs

Hope this helps.
Jeevan