[IronPython] MissingMemberException but it definitely exists

[Michael Foord]

Bob Uva wrote:
> I just started using IronPython and am using SharpDevelop as an IDE.
> I'm creating a REST web service, and have a class that has a function
> named 'run' in it. When I create an instance of the class and then try
> calling its run function I get a MissingMemberException saying that
> the class has no attribute 'run'. This exception is thrown from
> Microsoft.Scripting.Actions.MatchCaller.Call2. Shown below is the call
> stack shown in the exception dialog from the IDE. I've even reduced
> the run function to just calling pass and that doesn't work. Any ideas
> where to look to debug this further?
>   

Can you reproduce a minimal example - without seeing any code it is 
impossible to have any idea. The first suspect I'm afraid is that the 
object isn't what you think it is and doesn't have a run member.

Michael

> Thanks,
>  Bob
>
> System.MissingMemberException: 'AddressFilesService' object has no
> attribute 'run'
>    at Microsoft.Scripting.Actions.MatchCaller.Call2
>    at Microsoft.Scripting.Actions.CallSite<Microsoft.Func<Microsoft.Scripting.Actions.CallSite,System.Object,Microsoft.Scripting.Runtime.CodeContext,System.Object>>.UpdateAndExecute
>    at Microsoft.Scripting.Actions.UpdateDelegates.Update2
>    at DLRCachedCode.<lambda$9>$51
>    at Microsoft.Scripting.Actions.MatchCaller.Call1
>    at Microsoft.Scripting.Actions.CallSite<Microsoft.Func<Microsoft.Scripting.Actions.CallSite,System.Object,System.Object>>.UpdateAndExecute
>    at Microsoft.Scripting.Actions.UpdateDelegates.Update1
>    at System.Threading.ThreadHelper.ThreadStart_Context
>    at System.Threading.ExecutionContext.Run
>    at System.Threading.ThreadHelper.ThreadStart
>
>   


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