Erlang Dependency Not Started Error

Question

I am trying to run a start script but I end up with the following error. ``` {"init terminating in do_boot",{{case_clause,{error,{not_started,ranch}}},[{egs,ensure_started,1,[{file,"src/egs.erl"},{line,84}]},{egs,start,0,[{file,"src/egs.erl"},{line,49}]},{init,start_it,1,[]},{init,start_em,1,[]}]}} ``` I can compile the entire folder with multiple dependencies and this is the only one with an error. I use 'make' to compile and it is supposed to be 'make run' to run but that isn't working. Is that why I am getting this error? Any ideas on how to fix it would be greatly appreciated. The file where I get the error from is below. ``` -module(egs). -export([start/0, stop/0, global/1, warp/4, warp/5]). %% API. %% Player and account-related types. -type gid() :: 0..16#ffffffff. -type lid() :: 0..1023 | 16#ffff. -type character_slot() :: 0..3. -export_type([gid/0, lid/0, character_slot/0]). %% Location related types. -type uniid() :: 21 | 26..254 | 16#ffffffff. -type questid() :: 0..16#ffffff…

Accepted Answer

The order of application startup is important. In particular, `cowboy` depends on `ranch` and `crypto`. Also, `public_key` depends on `crypto` and must be started before `ssl`. The correct start order is:

```
ok = application:start(crypto),
ok = application:start(public_key),
ok = application:start(ssl),
ok = application:start(ranch),
ok = application:start(cowboy),
ok = application:start(egs).
```

For applications built with Rebar, the startup dependencies are listed in `[app]/src/[app].app.src`. See the LYSE chapter.

The reason it didn't work out of the box is probably that EGS depends on Cowboy's master branch, which quite recently introduced Ranch as a dependency.

Erlang Dependency Not Started Error

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