How to fix ''Cannot convert MWArray to requested type"












0















I'm starting to set up a WCF Server for a Matlab application, and would like to receive a struct back using the Microsoft WCF Test Client. I need help passing a Matlab struct back successfully.



I'm following instructions provided by MATHWORKS: 



https://www.mathworks.com/help/compiler_sdk/dotnet/create-windows-communications-foundation-based-components.html#bsuwtjv


I am using Windows 10, VS 2017, Community edition. For Matlab I am using:



<MathWorks_version_info>

  <version>9.5.0.944444</version>

  <release>R2018b</release>

  <description></description>

  <date>Aug 28 2018</date>

  <checksum>1708982227</checksum>




I have been able to successfully communicate across WCF using a simple string reply. I can pass data into Matlab, and generate a simple graph. However, when I try using the Matlab return through a struct, I can not seem to get past the error described below.



Matlab Function:



function y = callMATLABfunction( x )

    clearvars -except x; close all;

    if nargin == 1 && ~isempty(x)

        if isnumeric(x)



       [...]



           y.Completion = 1;

           y.Result = 'FirstCompletion';

           y.Message = 'Success';



        else



        [...]          



           y.Completion = 1;

           y.Result = 'SecondCompletion';

           y.Message = 'Success';



        end

    else

        y.Completion = 0;

        y.Result = 'Error';

        y.Message = 'Please supply one input variable';

    end

end


IMatlabInterface.cs:



using System;

using System.Collections.Generic;

using System.Linq;

using System.Runtime.Serialization;

using System.ServiceModel;

using MathWorks.MATLAB.NET.Arrays;

using MathWorks.MATLAB.NET.Utility;

using System.Text;

using System.Threading.Tasks;



namespace MatlabSvc

{

    [ServiceContract]

    public interface IMatlabInterface

    {

        [OperationContract(Name = "callMATLABfunction_1")]

        y callMATLABfunction(System.Double x);

        [OperationContract(Name = "callMATLABfunction_2")]

        y callMATLABfunction(System.String x);

    }

    [KnownType(typeof(y))]

    [DataContract]

    public class y

    {

        [DataMember]

        public double Completion { get; set; }

        [DataMember]

        public string Result { get; set; }

        [DataMember]

        public string Message { get; set; }

    }

}


I expected to see the return struct in Microsoft WCF Test Client. Instead, I get:



Cannot convert MWArray to requested type



Server stack trace:
at System.ServiceModel.Channels.ServiceChannel.ThrowIfFaultUnderstood(Message reply, MessageFault fault, String action, MessageVersion version, FaultConverter faultConverter)
at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object ins, Object outs, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)



Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at IMatlabInterface.callMATLABfunction_1(Double x)
at MatlabInterfaceClient.callMATLABfunction_1(Double x)






c# matlab wcf







share|improve this question

























  • I have made a test ,even when I use c# struct or c# class or combine c#struct with c# class, I could call the service successfully. [DataContract] public struct Y { [DataMember] public double Completion; [DataMember] public string Result; [DataMember] public string Message; } Maybe the problem is with the convert from matlab type to c# type, you could refer to the link below link

    – Ackelry Xu
    Jan 3 at 7:34


















0















I'm starting to set up a WCF Server for a Matlab application, and would like to receive a struct back using the Microsoft WCF Test Client. I need help passing a Matlab struct back successfully.



I'm following instructions provided by MATHWORKS: 



https://www.mathworks.com/help/compiler_sdk/dotnet/create-windows-communications-foundation-based-components.html#bsuwtjv


I am using Windows 10, VS 2017, Community edition. For Matlab I am using:



<MathWorks_version_info>

  <version>9.5.0.944444</version>

  <release>R2018b</release>

  <description></description>

  <date>Aug 28 2018</date>

  <checksum>1708982227</checksum>




I have been able to successfully communicate across WCF using a simple string reply. I can pass data into Matlab, and generate a simple graph. However, when I try using the Matlab return through a struct, I can not seem to get past the error described below.



Matlab Function:



function y = callMATLABfunction( x )

    clearvars -except x; close all;

    if nargin == 1 && ~isempty(x)

        if isnumeric(x)



       [...]



           y.Completion = 1;

           y.Result = 'FirstCompletion';

           y.Message = 'Success';



        else



        [...]          



           y.Completion = 1;

           y.Result = 'SecondCompletion';

           y.Message = 'Success';



        end

    else

        y.Completion = 0;

        y.Result = 'Error';

        y.Message = 'Please supply one input variable';

    end

end


IMatlabInterface.cs:



using System;

using System.Collections.Generic;

using System.Linq;

using System.Runtime.Serialization;

using System.ServiceModel;

using MathWorks.MATLAB.NET.Arrays;

using MathWorks.MATLAB.NET.Utility;

using System.Text;

using System.Threading.Tasks;



namespace MatlabSvc

{

    [ServiceContract]

    public interface IMatlabInterface

    {

        [OperationContract(Name = "callMATLABfunction_1")]

        y callMATLABfunction(System.Double x);

        [OperationContract(Name = "callMATLABfunction_2")]

        y callMATLABfunction(System.String x);

    }

    [KnownType(typeof(y))]

    [DataContract]

    public class y

    {

        [DataMember]

        public double Completion { get; set; }

        [DataMember]

        public string Result { get; set; }

        [DataMember]

        public string Message { get; set; }

    }

}


I expected to see the return struct in Microsoft WCF Test Client. Instead, I get:



Cannot convert MWArray to requested type



Server stack trace:
at System.ServiceModel.Channels.ServiceChannel.ThrowIfFaultUnderstood(Message reply, MessageFault fault, String action, MessageVersion version, FaultConverter faultConverter)
at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object ins, Object outs, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)



Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at IMatlabInterface.callMATLABfunction_1(Double x)
at MatlabInterfaceClient.callMATLABfunction_1(Double x)






c# matlab wcf







share|improve this question

























  • I have made a test ,even when I use c# struct or c# class or combine c#struct with c# class, I could call the service successfully. [DataContract] public struct Y { [DataMember] public double Completion; [DataMember] public string Result; [DataMember] public string Message; } Maybe the problem is with the convert from matlab type to c# type, you could refer to the link below link

    – Ackelry Xu
    Jan 3 at 7:34
















0












0








0








I'm starting to set up a WCF Server for a Matlab application, and would like to receive a struct back using the Microsoft WCF Test Client. I need help passing a Matlab struct back successfully.



I'm following instructions provided by MATHWORKS: 



https://www.mathworks.com/help/compiler_sdk/dotnet/create-windows-communications-foundation-based-components.html#bsuwtjv


I am using Windows 10, VS 2017, Community edition. For Matlab I am using:



<MathWorks_version_info>

  <version>9.5.0.944444</version>

  <release>R2018b</release>

  <description></description>

  <date>Aug 28 2018</date>

  <checksum>1708982227</checksum>




I have been able to successfully communicate across WCF using a simple string reply. I can pass data into Matlab, and generate a simple graph. However, when I try using the Matlab return through a struct, I can not seem to get past the error described below.



Matlab Function:



function y = callMATLABfunction( x )

    clearvars -except x; close all;

    if nargin == 1 && ~isempty(x)

        if isnumeric(x)



       [...]



           y.Completion = 1;

           y.Result = 'FirstCompletion';

           y.Message = 'Success';



        else



        [...]          



           y.Completion = 1;

           y.Result = 'SecondCompletion';

           y.Message = 'Success';



        end

    else

        y.Completion = 0;

        y.Result = 'Error';

        y.Message = 'Please supply one input variable';

    end

end


IMatlabInterface.cs:



using System;

using System.Collections.Generic;

using System.Linq;

using System.Runtime.Serialization;

using System.ServiceModel;

using MathWorks.MATLAB.NET.Arrays;

using MathWorks.MATLAB.NET.Utility;

using System.Text;

using System.Threading.Tasks;



namespace MatlabSvc

{

    [ServiceContract]

    public interface IMatlabInterface

    {

        [OperationContract(Name = "callMATLABfunction_1")]

        y callMATLABfunction(System.Double x);

        [OperationContract(Name = "callMATLABfunction_2")]

        y callMATLABfunction(System.String x);

    }

    [KnownType(typeof(y))]

    [DataContract]

    public class y

    {

        [DataMember]

        public double Completion { get; set; }

        [DataMember]

        public string Result { get; set; }

        [DataMember]

        public string Message { get; set; }

    }

}


I expected to see the return struct in Microsoft WCF Test Client. Instead, I get:



Cannot convert MWArray to requested type



Server stack trace:
at System.ServiceModel.Channels.ServiceChannel.ThrowIfFaultUnderstood(Message reply, MessageFault fault, String action, MessageVersion version, FaultConverter faultConverter)
at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object ins, Object outs, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)



Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at IMatlabInterface.callMATLABfunction_1(Double x)
at MatlabInterfaceClient.callMATLABfunction_1(Double x)






c# matlab wcf







share|improve this question
















I'm starting to set up a WCF Server for a Matlab application, and would like to receive a struct back using the Microsoft WCF Test Client. I need help passing a Matlab struct back successfully.



I'm following instructions provided by MATHWORKS: 



https://www.mathworks.com/help/compiler_sdk/dotnet/create-windows-communications-foundation-based-components.html#bsuwtjv


I am using Windows 10, VS 2017, Community edition. For Matlab I am using:



<MathWorks_version_info>

  <version>9.5.0.944444</version>

  <release>R2018b</release>

  <description></description>

  <date>Aug 28 2018</date>

  <checksum>1708982227</checksum>




I have been able to successfully communicate across WCF using a simple string reply. I can pass data into Matlab, and generate a simple graph. However, when I try using the Matlab return through a struct, I can not seem to get past the error described below.



Matlab Function:



function y = callMATLABfunction( x )

    clearvars -except x; close all;

    if nargin == 1 && ~isempty(x)

        if isnumeric(x)



       [...]



           y.Completion = 1;

           y.Result = 'FirstCompletion';

           y.Message = 'Success';



        else



        [...]          



           y.Completion = 1;

           y.Result = 'SecondCompletion';

           y.Message = 'Success';



        end

    else

        y.Completion = 0;

        y.Result = 'Error';

        y.Message = 'Please supply one input variable';

    end

end


IMatlabInterface.cs:



using System;

using System.Collections.Generic;

using System.Linq;

using System.Runtime.Serialization;

using System.ServiceModel;

using MathWorks.MATLAB.NET.Arrays;

using MathWorks.MATLAB.NET.Utility;

using System.Text;

using System.Threading.Tasks;



namespace MatlabSvc

{

    [ServiceContract]

    public interface IMatlabInterface

    {

        [OperationContract(Name = "callMATLABfunction_1")]

        y callMATLABfunction(System.Double x);

        [OperationContract(Name = "callMATLABfunction_2")]

        y callMATLABfunction(System.String x);

    }

    [KnownType(typeof(y))]

    [DataContract]

    public class y

    {

        [DataMember]

        public double Completion { get; set; }

        [DataMember]

        public string Result { get; set; }

        [DataMember]

        public string Message { get; set; }

    }

}


I expected to see the return struct in Microsoft WCF Test Client. Instead, I get:



Cannot convert MWArray to requested type



Server stack trace:
at System.ServiceModel.Channels.ServiceChannel.ThrowIfFaultUnderstood(Message reply, MessageFault fault, String action, MessageVersion version, FaultConverter faultConverter)
at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object ins, Object outs, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)



Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at IMatlabInterface.callMATLABfunction_1(Double x)
at MatlabInterfaceClient.callMATLABfunction_1(Double x)






c# matlab wcf




c# matlab wcf






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Jan 2 at 21:03







Charlie Peppler

















asked Jan 2 at 20:40









Charlie PepplerCharlie Peppler

13




13













  • I have made a test ,even when I use c# struct or c# class or combine c#struct with c# class, I could call the service successfully. [DataContract] public struct Y { [DataMember] public double Completion; [DataMember] public string Result; [DataMember] public string Message; } Maybe the problem is with the convert from matlab type to c# type, you could refer to the link below link

    – Ackelry Xu
    Jan 3 at 7:34





















  • I have made a test ,even when I use c# struct or c# class or combine c#struct with c# class, I could call the service successfully. [DataContract] public struct Y { [DataMember] public double Completion; [DataMember] public string Result; [DataMember] public string Message; } Maybe the problem is with the convert from matlab type to c# type, you could refer to the link below link

    – Ackelry Xu
    Jan 3 at 7:34



















I have made a test ,even when I use c# struct or c# class or combine c#struct with c# class, I could call the service successfully. [DataContract] public struct Y { [DataMember] public double Completion; [DataMember] public string Result; [DataMember] public string Message; } Maybe the problem is with the convert from matlab type to c# type, you could refer to the link below link

– Ackelry Xu
Jan 3 at 7:34







I have made a test ,even when I use c# struct or c# class or combine c#struct with c# class, I could call the service successfully. [DataContract] public struct Y { [DataMember] public double Completion; [DataMember] public string Result; [DataMember] public string Message; } Maybe the problem is with the convert from matlab type to c# type, you could refer to the link below link

– Ackelry Xu
Jan 3 at 7:34














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