# NoMethodException

**URL:** <https://www.ruby-forum.com/t/nomethodexception/240400>\
**Category:** IronRuby\
**Created:** [April 11, 2014, 6:38pm UTC](https://www.ruby-forum.com/t/nomethodexception/240400 "2014-04-11T18:38:47Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![musicdenotation](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ea666f/32.png) [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\
**Post date:** [April 11, 2014, 6:38pm UTC](https://www.ruby-forum.com/t/nomethodexception/240400/1 "2014-04-11T18:38:47Z")

</div>

I am running IronRuby 1.1.3 as installed from NuGet. It is loading a  
very simple script that creates a class and calls a method on that  
class. This exception is thrown:

* * *

System.MissingMethodException: Method not found:  
‘Microsoft.Scripting.Actions.Ca  
lls.OverloadInfo[]  
Microsoft.Scripting.Actions.Calls.ReflectionOverloadInfo.Crea  
teArray(System.Reflection.MemberInfo[])’.  
at IronRuby.Builtins.RubyClass.GetConstructors(Type type)  
at  
IronRuby.Builtins.RubyClass.BuildObjectConstructionNoFlow(MetaObjectBuilde  
r metaBuilder, CallArguments args, String methodName)  
at  
IronRuby.Builtins.RubyClass.BuildObjectConstruction(MetaObjectBuilder  
meta  
Builder, CallArguments args, String methodName)  
at IronRuby.Runtime.Calls.RubyMemberInfo.BuildCall(MetaObjectBuilder  
metaBuil  
der, CallArguments args, String name)

* * *

The ruby code being loaded:

class MyClass

```
def run
puts 'Hello, World!'

```

end

end

hello = MyClass.new

* * *

I have all of the required references set IronRuby, IronRuby.Libraries,  
IronRuby.Libraries.Yaml, Microsoft.Scripting,  
Microsoft.Scripting.Metadata, Microsoft.Dynamic.

I downloaded the binaries and referenced those files directly and still  
same issue.

I installed the IronRuby package as well and from the command promp I  
get the same error. Any idea what’s going on here?

There was another thread with this same issue but the system told me to  
start a new topic as that one was old.

Bill

---

<div class="post-metadata">

**Author:** ![sasuke](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/aca169/32.png) [@sasuke](https://www.ruby-forum.com/u/sasuke)\
**Post date:** [April 29, 2014, 6:52am UTC](https://www.ruby-forum.com/t/nomethodexception/240400/2 "2014-04-29T06:52:54Z")

</div>

Can you give an example of the ruby code that is failing?

The error indicates IronRuby is having trouble finding an appropriate  
constructor to call for a C# class  
Can you give some more information about the class you’re trying to  
instantiate? eg

- What constructors does it have
- Are they private/protected
- What parameters does each have
- anything else that might be relevant

Regards

Orion