Service Crash when creating Com object from RTC Client

I have a problem I´m unable to figure out what the solutions could be

We are running the setup in a 2-tier enviroment (SQL server and Services on same machine)

When I run my functionality on the Server I do not get any problems, the error occurs only when we try to run it from the RTC client outside the server the Service crashes and I get following information. (if I run the Classic Client outside the server no problems)

The server "net.[url=tcp://navision:7046/DynamicsNAV/Service]tcp://navision:7046/DynamicsNAV/Service[/url]" is either unavailable or your connection has been lost. Do you want to attempt to reconnect?”

> Yes

“The connection to the server has been lost. The application will close.”

I was able to debug with messages and figure out where the problem occurs and the following code is the problem

***********

IF ISCLEAR(clientFso) THEN CREATE(clientFso, FALSE, TRUE);

clientFSO is a variable to the automation : 'Microsoft Scripting Runtime'.FileSystemObject

***********

and this seems to be the problem when trying to create the object on the Client PC (but this only occurs through the RTC klient)

Anybody knows what this could be

From the log fil I get following information:

Service: MicrosoftDynamicsNavServer$NAV2
Type: System.InvalidCastException
Message: Unable to cast object of type 'System.Int32' to type 'Microsoft.Dynamics.Nav.Types.AutomationMethodResponse'.
StackTrace:
at Microsoft.Dynamics.Nav.Runtime.NavApplicationMethod.InvokeMethod(Object obj, String methodName, Object[] args)
at Microsoft.Dynamics.Nav.Service.NSField.ActionField(NavConnection con)
at Microsoft.Dynamics.Nav.Service.NSField.Action(NavConnection connection)
at Microsoft.Dynamics.Nav.Service.NSService.<>c__DisplayClass21.<ActionField>b__20(Connection connection)
at Microsoft.Dynamics.Nav.Service.NSService.ExecuteOperation[T](String operationName, ServiceOperation`1 operation, Connection connection, Boolean revertLanguageChanges, WindowsIdentity impersonationIdentity)
Source: Microsoft.Dynamics.Nav.Ncl

---

Type: System.Reflection.TargetInvocationException
Message: Exception has been thrown by the target of an invocation.
StackTrace:
at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
at System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at Microsoft.Dynamics.Nav.Runtime.NavApplicationMethod.InvokeMethod(Object obj, String methodName, Object[] args)
Source: mscorlib

---

Type: System.InvalidCastException
Message: Unable to cast object of type 'System.Int32' to type 'Microsoft.Dynamics.Nav.Types.AutomationMethodResponse'.
StackTrace:
at Microsoft.Dynamics.Nav.Service.NSClientCallback.CreateAutomationObject(Guid classId, String licenseKey, Boolean newServer)
at Microsoft.Dynamics.Nav.Runtime.NavAutomation.Create(DataError errorLevel, Boolean newServer, Boolean clientSide)
at Microsoft.Dynamics.Nav.BusinessApplication.Codeunit75400.EmailPostedSalesInvoice(INavRecordHandle header, Boolean includePDF, Boolean includeImages, Boolean includeXML) in c:\ProgramData\Microsoft\Microsoft Dynamics NAV\60\Server\MicrosoftDynamicsNavServer$NAV2\source\Codeunit\Codeunit75400.cs:line 578
at Microsoft.Dynamics.Nav.BusinessApplication.Codeunit75400.OnInvoke(Int32 memberId, Object[] args) in c:\ProgramData\Microsoft\Microsoft Dynamics NAV\60\Server\MicrosoftDynamicsNavServer$NAV2\source\Codeunit\Codeunit75400.cs:line 0
at Microsoft.Dynamics.Nav.Runtime.NavApplicationObjectBase.Invoke(Int32 methodId, Object[] arguments)
at Microsoft.Dynamics.Nav.BusinessApplication.Page75500.Control1160840030_OnAction() in c:\ProgramData\Microsoft\Microsoft Dynamics NAV\60\Server\MicrosoftDynamicsNavServer$NAV2\source\Page\Page75500.cs:line 117
Source: Microsoft.Dynamics.Nav.Service