[erlang-questions] Unexpected reply: [rex [badrpc [EXIT [undef ([distel rpc_entry (distel modules ("cr"))] [rpc -handle_call/3-fun-0- 5])]]]]

[Ngoc Dao]

My project structure:
ebin
    .beam files
src
    web
        .erl files

I do the following:
* Setup cookie with ~/.erlang.cookie file
* From console (not from Distel), sstart a node, paths are set with
-pa option to the erl command
* From Emacs open a src/web/my_module.erl file
* From Distel, connect to the node, the connection is confirmed by
listing all processes on the node
* From Distel, load my_module
* From Distel, intepret the module, this fails with "forever" message
"Interpreting: my_module"
* Breakpoint does not work because the module is not intepreted

I'm using Distel 4.03 from http://code.google.com/p/distel/ with the
Erlang R13B01 on Snow Leopard.


On Mon, Sep 14, 2009 at 12:29 PM, Eric Liang <eric.l.2046@REDACTED> wrote:
> Ngoc Dao wrote:
>
> After many try-and-errors I suspect that Distel currently can only
> interpret a module if its .beam file is in the same directory with its
> .erl file, or in ../ebin. Is this true? How to overcome this problem?
>
>
>
> Maybe add_path will help you.
>
> @spec code:add_patha(Dir) => true | {error, bad_directory}
>
> And you can check this by code:get_path().
>
> On Sat, Sep 12, 2009 at 1:09 AM, Eric Liang <eric.l.2046@REDACTED> wrote:
>
>
> Eric Liang wrote:
>
> Ngoc Dao wrote:
>
> I tried Distel from trunk yesterday and it did not work. The version
> from download did work:
> http://code.google.com/p/distel/downloads/list.
>
>
>
> Thanks Ngoc, it works. But, still can't debug and profile, like Bill
> Clementson's introduction.
>
> When I type C-c C-d i, it looks like is interpreting forever, and can't set
> breakpoints to debug. I've checked the archive of this mailling list, there
> is only one unresolved thread here:
>
> http://groups.google.com/group/erlang-programming/browse_thread/thread/c34d5245998948c6
>
> Do you have more suggestions? TIA.
>
> I think I've resolved this. Just load module (C-c C-d L) before being
> interpreted. So simple. :-[
>
> In Distel, load module will tell you nothing more than "load: [module
> test_ring]", except the first time is successful, in which scenario, it will
> tell you "Successfully uploaded backend modules into node". So, It's
> difficulty to  know  whether or not the module was loaded  successfully.
>
> And, one module can be loaded only if it's beam has been compiled by the
> flag: debug_info.
>
>
> On Thu, Sep 10, 2009 at 6:46 PM, Eric Liang <eric.l.2046@REDACTED> wrote:
>
>
> Hi all,
> To build a erlang IDE, I've tried Distel in emacs22. but unfortunately it
> does not work well. What I've done is exactly in accordance with Bill
> Clementson's blog post:
>
> http://bc.tech.coop/blog/070528.html
>
> They are:
>
> Download the latest code from :  http://distel.googlecode.com/svn/trunk/
> Modify the .emacs. I did confirm the load-path and distel-dir settings are
> correct. Here is it:
>
> ;; This is needed for Erlang mode setup
> (setq erlang-root-dir "/usr/local/lib/erlang")
> (setq load-path (cons "/usr/local/lib/erlang/lib/tools-2.5.1/emacs"
> load-path))
> (setq exec-path (cons "/usr/local/lib/erlang/bin" exec-path))
> (require 'erlang-start)
>
> ;; This is needed for Distel setup
> (let ((distel-dir "/Users/bc/Projects/distel/elisp"))
>   (unless (member distel-dir load-path)
>     ;; Add distel-dir to the end of load-path
>     (setq load-path (append load-path (list distel-dir)))))
>
> (require 'distel)
> (distel-setup)
>
> ;; Some Erlang customizations
> (add-hook 'erlang-mode-hook
> 	  (lambda ()
> 	    ;; when starting an Erlang shell in Emacs, default in the node name
> 	    (setq inferior-erlang-machine-options '("-sname" "emacs"))
> 	    ;; add Erlang functions to an imenu menu
> 	    (imenu-add-to-menubar "imenu")))
>
> ;; A number of the erlang-extended-mode key bindings are useful in the shell
> too
> (defconst distel-shell-keys
>   '(("\C-\M-i"   erl-complete)
>     ("\M-?"      erl-complete)	
>     ("\M-."      erl-find-source-under-point)
>     ("\M-,"      erl-find-source-unwind)
>     ("\M-*"      erl-find-source-unwind)
>     )
>   "Additional keys to bind when in Erlang shell.")
>
> (add-hook 'erlang-shell-mode-hook
> 	  (lambda ()
> 	    ;; add some Distel bindings to the Erlang shell
> 	    (dolist (spec distel-shell-keys)
> 	      (define-key erlang-shell-mode-map (car spec) (cadr spec)))))
>
> When I open a .erl file, it works well and Distel dose exist in the Erlang
> tag of the emacs' menubar. But when I type C-M-i behind the word "cr" to
> complete the function name,the emacs received this message:
>
> Unexpected reply: [rex [badrpc [EXIT [undef ([distel rpc_entry (distel
> modules ("cr"))] [rpc -handle_call/3-fun-0- 5])]]]]
>
> I checked the code in Distel, it looks like that it will call completions()
> which will call the get() by the argument:A  an empty string("")  in
> otp_doc.erl.  The function get() will call to_list() on the argument:A,which
> will get the error:
>
> *** ERROR: Shell process terminated! ***
>
> =ERROR REPORT==== 8-Sep-2009::15:02:42 ===
> Error in process <0.66.0> on node 'emacs@REDACTED' with exit value:
> {undef,[{lib,format_exception,[4,error,undef,[{erl_internal,bif,[to_list,1]},{erl_lint,expr,3},{erl_lint,exprs,3},{erl_lint,exprs_opt,3},{erl_eval,check_command,2},{shell,exprs,6},{shell,eval_exprs,6},{shell,eval_loop..
>
> I guess this is the reason for the completion failure, but have no idea how
> to fix it. Can anyone here give me some advice?
>
> As a newbie in Erlang, it's very possible I've stepped in the wrong
> way.However, any suggestions will be appreciated.
>
> Thanks in advance.
>
> Eric
>
>
>
>
>