Hi Professor Bangerth,

Thank you for the reply! And sorry for the late response.

1. Yes I can step into other lines of code fine :)

2. Hitting Ctrl-C twice does not do anything and it still hangs there.

However, good news - we tracked it down on GitHub!

The initial discussion started here:
https://github.com/dealii/dealii/issues/6919#issuecomment-405028538

And then went here:
https://github.com/Microsoft/WSL/issues/3428

And it should be resolved for now. I'm still waiting for our IT department 
to upgrade my Windows to be able to see it, so I'll report back when I try 
it!

Thanks to everyone who helped!

Shawn

On Friday, July 13, 2018 at 4:59:56 PM UTC-7, Wolfgang Bangerth wrote:
>
> On 07/12/2018 04:36 PM, Yuxiang Wang wrote: 
> > 
> > I tried and I can neither step over (n) nor step into (s) that line of 
> code - 
> > either way, it hangs right there. 
>
> Can you step into other function calls? That's sort of the point of a 
> debugger, that you can get into functions :-) 
>
> When it hangs, hit Ctrl-C (maybe twice, if necessary). This should stop 
> execution at the place where it hangs. You can then type 'backtrace' to 
> get a 
> listing of where execution currently is. 
>
>
> > As for I run with just one processor - sorry but I am not sure about the 
> > question. The workstation is dual processor with 8 cores each; the 
> program was 
> > unchanged from the documentation. Or were you inquiring about something 
> else? 
>
> The number of processors doesn't matter. If you just say 
>    ./step-xy 
> then it's going to use just one MPI process. (Though each MPI process may 
> use 
> multiple cores for shared memory parallelization, but that's a separate 
> matter.) 
>
> If you want to use multiple MPI processes, you need to run the code as in 
>    mpirun -np 8 ./step-xy 
> for example. 
>
> Best 
>   W. 
>
> -- 
> ------------------------------------------------------------------------ 
> Wolfgang Bangerth          email:                 [email protected] 
> <javascript:> 
>                             www: http://www.math.colostate.edu/~bangerth/ 
>
>

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