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CreateCustomer CIM API issues (production)

We have an intermittent issue that started on/around June 15, 2018.  We are using the Authorize.NET provided .NET SDK (admittedly not the most current version and we made some very slight modifications to allow some select exceptions to be thrown out of the API so we can catch them, but I digress).


This issue is causing a not insignificant number of failures and error messages being returned back to our users.


A redacted exception stack trace:


SyntaxEditor Code Snippet

Exception: Unable to connect to the remote server
Exception: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond
   at System.Net.HttpWebRequest.GetRequestStream(TransportContext& context)
   at System.Net.HttpWebRequest.GetRequestStream()
   at AuthorizeNet.HttpXmlUtility.Send(ANetApiRequest apiRequest) in **********\Authorize.NET\Utility\HttpXmlUtility.cs:line 64
   at AuthorizeNet.CustomerGateway.CreateCustomer(String email, String description, String merchantCustomerId) in **********\Authorize.NET\CIM\CustomerGateway.cs:line 57
   at **********.CreateCustomerProfile(**********)


Every instance of the error we've logged thusfar has been to the same IP address (


Please advise!



Hi Alan,


This may be due to .NET SDK version. If you are using anything before version 1.9.4 then our recommendation would be to download the latest version from


Please revert if you have any further queries / facing any issues



Developer Developer