I have a WCF service that is hosted in IIS7, this service is just a wrapper of another service, so what it does it calls the actual service then return a response which is then passed on to the client. The issue that I'm having is that I send a request and it returns data, when I send another request with the second then I get the below error: Please will you share some light on what could be a problem here.
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    <title>Specified argument was out of the range of valid values.<br>Parameter name: value</title>
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        <span><H1>Server Error in '/VendorSelfCarewebapi' Application.<hr width=100% size=1 color=silver></H1>
        <h2> <i>Specified argument was out of the range of valid values.<br>Parameter name: value</i> </h2></span>
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           <b> Description: </b>   An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
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        <b> Exception Details: </b>System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values.<br>Parameter name: value<br><br>
        <b>Source Error:</b> <br><br>
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                  <code>An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.</code>
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        <b>Stack Trace:</b> <br><br>
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                <code><pre>
                [ArgumentOutOfRangeException: Specified argument was out of the range of valid values.
                Parameter name: value]
                 System.Web.HttpResponse.set_StatusDescription(String value) +3165151
                 System.Web.HttpResponseWrapper.set_StatusDescription(String value) +9
                 System.Web.Http.WebHost.HttpControllerHandler.CopyResponseStatusAndHeaders(HttpContextBase httpContextBase, HttpResponseMessage response) +53
                 System.Web.Http.WebHost.<ConvertResponse>d__6.MoveNext() +96
                 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +93
                 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +52
                 System.Web.Http.WebHost.<ProcessRequestAsyncCore>d__0.MoveNext() +381
                 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +93
                 System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +52
                 System.Web.TaskAsyncHelper.EndTask(IAsyncResult ar) +60
                 System.Web.HttpTaskAsyncHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +6
                 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9651516
                 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155
                </pre></code>
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        <b>Version Information:</b> Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.34274
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[ArgumentOutOfRangeException]: Specified argument was out of the range of valid values.
Parameter name: value
   at System.Web.HttpResponse.set_StatusDescription(String value)
   at System.Web.HttpResponseWrapper.set_StatusDescription(String value)
   at System.Web.Http.WebHost.HttpControllerHandler.CopyResponseStatusAndHeaders(HttpContextBase httpContextBase, HttpResponseMessage response)
   at System.Web.Http.WebHost.HttpControllerHandler.<ConvertResponse>d__6.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Web.Http.WebHost.HttpControllerHandler.<ProcessRequestAsyncCore>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Web.TaskAsyncHelper.EndTask(IAsyncResult ar)
   at System.Web.HttpTaskAsyncHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result)
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
 
     
     
    