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    When using a WCF (localhost) application using infer.net, I get an exception at the following line:

    Dirichlet pPost = engine.Infer<Dirichlet>(p);
    double[] alpha = new double[] { 1.2, 3.4 };
Range dim = new Range(alpha.Length).Named("dim");
Variable<Vector> p = Variable.Dirichlet(dim, alpha).Named("p");
int n = 10;
VariableArray<int> x = Variable.Multinomial(n, p).Named("x");
InferenceEngine engine = new InferenceEngine(new VariationalMessagePassing());
int[] k = new int[] { 3, 7 };
x.ObservedValue = k;
Dirichlet pPost = engine.Infer<Dirichlet>(p);

    Please advise?

    matekus

    Illiud Latine dici non potest.

    Wednesday, October 2, 2013 10:07 PM

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    Looks like it is trying to write the generated source files to disk, and hitting an error.  Try setting engine.Compiler.WriteSourceFiles = false; engine.Compiler.GenerateInMemory = true;
    • Marked as answer by _matekus_ Friday, October 4, 2013 6:29 PM
    Friday, October 4, 2013 12:22 PM
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    What exception do you get? What does WCF have to do with it? I just built your model (in a console app) and it ran just fine.
    Thursday, October 3, 2013 12:21 AM
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    Yordan,

    Thanks for the prompt follow-up.
    Yes, I agree that there is no problem with using the above code in a console application. However, I get the following stack trace when I attempt to use it in a WCF context (see "C:\infernetBuilds\19-04-2013_13-25\Compiler\Infer\InferenceEngine.cs:line 496"):

    <StackTrace>at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)   at System.IO.Directory.InternalCreateDirectory(String fullPath, String path, Object dirSecurityObj, Boolean checkHost)   at System.IO.Directory.InternalCreateDirectoryHelper(String path, Boolean checkHost)   at System.IO.Directory.CreateDirectory(String path)   at MicrosoftResearch.Transforms.CodeCompiler.WriteSource(List`1 typeDeclarations, IList`1 filenames, ICollection`1&amp; referencedAssemblies) in C:\infernetBuilds\19-04-2013_13-25\Compiler\TransformFramework\CodeTransformer.cs:line 135   at MicrosoftResearch.Transforms.CodeCompiler.WriteAndCompile(List`1 typeDeclarations) in C:\infernetBuilds\19-04-2013_13-25\Compiler\TransformFramework\CodeTransformer.cs:line 199   at MicrosoftResearch.Infer.ModelCompiler.CompileWithoutParams(ITypeDeclaration itd, MethodBase method, AttributeRegistry`2 inputAttributes) in C:\infernetBuilds\19-04-2013_13-25\Compiler\Infer\ModelCompiler.cs:line 506   at MicrosoftResearch.Infer.InferenceEngine.Compile() in C:\infernetBuilds\19-04-2013_13-25\Compiler\Infer\InferenceEngine.cs:line 188   at MicrosoftResearch.Infer.InferenceEngine.BuildAndCompile(Boolean inferOnlySpecifiedVars, IEnumerable`1 vars) in C:\infernetBuilds\19-04-2013_13-25\Compiler\Infer\InferenceEngine.cs:line 531   at MicrosoftResearch.Infer.InferenceEngine.GetCompiledInferenceAlgorithm(Boolean inferOnlySpecifiedVars, IVariable var) in C:\infernetBuilds\19-04-2013_13-25\Compiler\Infer\InferenceEngine.cs:line 496   at MicrosoftResearch.Infer.InferenceEngine.InferAll(Boolean inferOnlySpecifiedVars, IVariable var) in C:\infernetBuilds\19-04-2013_13-25\Compiler\Infer\InferenceEngine.cs:line 415   at MicrosoftResearch.Infer.InferenceEngine.Infer[TReturn](IVariable var) in C:\infernetBuilds\19-04-2013_13-25\Compiler\Infer\InferenceEngine.cs:line 234   at multibayes.Service1.DirichletCounts() in c:\wip_matekus\appdev\vs2013\projects\wcf\multibayes\Service1.svc.cs:line 64   at SyncInvokeDirichletCounts(Object , Object[] , Object[] )   at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]&amp; outputs)   at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc&amp; rpc)   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc&amp; rpc)   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage41(MessageRpc&amp; rpc)   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage4(MessageRpc&amp; rpc)   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage31(MessageRpc&amp; rpc)   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage3(MessageRpc&amp; rpc)   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage2(MessageRpc&amp; rpc)   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage11(MessageRpc&amp; rpc)   at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage1(MessageRpc&amp; rpc)   at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet)</StackTrace>


    matekus

    Illiud Latine dici non potest.



    • Edited by _matekus_ Thursday, October 3, 2013 1:59 PM
    Thursday, October 3, 2013 1:57 PM
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    Looks like it is trying to write the generated source files to disk, and hitting an error.  Try setting engine.Compiler.WriteSourceFiles = false; engine.Compiler.GenerateInMemory = true;
    • Marked as answer by _matekus_ Friday, October 4, 2013 6:29 PM
    Friday, October 4, 2013 12:22 PM
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    Thanks Tom.

    Your solution worked.

    matekus

    Illiud Latine dici non potest.

    Friday, October 4, 2013 6:28 PM