[erlang-questions] Questions about OTP debugging...

Mazen Harake mazen.harake@REDACTED
Tue Feb 1 10:32:04 CET 2011

Hi Peter,

Perhaps my tutorial from the Erlang User Conference will help you out:

Good luck.



On 01/02/2011 00:17, Peter W. Morreale wrote:
> I'm new to Erlang and OTP and have some general questions about
> debugging.  I'm learning erland and otp with the books: Programming
> Erlang" and "Erlang and OTP".
> Currently I'm working on the "tcp_rpc" example in the OTP book.  I have
> the tr_server module written and working according to the example in the
> book.  Now I'm trying to add a supervisor and application to create a
> complete OTP application.
> At the moment I have all the source created and compiled, as referenced
> by the code in the book.  When I attempt to start the application, I get
> the following:
> pmorreale@REDACTED:~/erlang>  cd rpc
> pmorreale@REDACTED:~/erlang/rpc>  erl -pa ebin
> Erlang R14B (erts-5.8.1) [source] [64-bit] [smp:2:2] [rq:2]
> [async-threads:0] [hipe] [kernel-poll:false]
> Eshell V5.8.1  (abort with ^G)
> 1>  application:start(tcp_rpc).
> {error,{not_loaded,tcp_rpc}}
> 2>
> The question is how to debug this?  Please note that I'm less interested
> in getting this app to work, than to learn debugging strategies related
> to erlang and OTP.
> Is there some flag/etc available to turn on logging or tracing?
> Thanks,
> -PWM
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