| Author |
Message |
< Open Telecom Platform (OTP) ~ bad_application error starting erlang gen_server application |
| andyc |
 Posted: Sat Apr 10, 2010 2:19 pm |
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Joined: 10 Apr 2010
Posts: 4
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I have written a simple erlang app using gen_server.
When starting it with application:start(myapp), I get the following tuple...
{error,{bad_application,{application,myapp ... (rest of my application config).
There are no other error or warning messages. I have also tried to google examples of how to configure gen_server and also the error itself. I am surprised at how little information there is out there.
I could start trying to debug OTP?? Any pointers would be appreciated. |
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| Michal Ptaszek |
| Posted: Tue Apr 13, 2010 7:01 am |
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User
Joined: 01 May 2008
Posts: 35
Location: Krakow
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The {error, {bad_application, Name}} error is returned when application:start(Name) is called with a wrong argument.
According to the documentation, Name must be an atom. However, from looking at the error you pasted:
{error,{bad_application,{application,myapp ..}}
I conclude the application has been started as:
application:start({application, myapp, ...})
instead of
application:start(myapp).
(I assume you are using interactive, not embedded mode) |
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| andyc |
| Posted: Tue Apr 13, 2010 11:54 am |
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Joined: 10 Apr 2010
Posts: 4
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| I have passed the atom myapp , the atom representing the name of the application. |
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| Michal Ptaszek |
| Posted: Tue Apr 13, 2010 11:58 am |
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Joined: 01 May 2008
Posts: 35
Location: Krakow
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| How does the myapp.app file contents look like then? |
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| andyc |
| Posted: Tue Apr 13, 2010 12:42 pm |
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Joined: 10 Apr 2010
Posts: 4
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The idea is to expose some code in foo.py via an erlang 'port'.
Code:
{appliction, foo_app,
[{description, "Foo Port server"},
{vsn, "1.0"},
{modules, [foo_app, foo_sup, foo]},
{registered, [foo]},
{applications, [kernal, stdlib]},
{mod, {foo_app, []}},
{env, [{extprog, "foo.py"}, {timeout, 3000}, {maxline, 100}]}
]}.
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| Michal Ptaszek |
| Posted: Tue Apr 13, 2010 2:28 pm |
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User
Joined: 01 May 2008
Posts: 35
Location: Krakow
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| I can see a typo in application keyword in .app file: is it the case? |
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| andyc |
| Posted: Wed Apr 14, 2010 12:24 am |
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Joined: 10 Apr 2010
Posts: 4
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Wo, you are right 
Thanks very much for helping me find this insideous little 'bug'. I hope OTP might get better error messages moving forward 
I really appreciate your help. (haven't tested this since, i'm at work) |
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