Resolving error 'The underlying connection was closed: An unexpected error occurred on a send' in NAVISION / Business Central
Introduction: Today, as I was working with Real-Time Integration with TCI Scribe, I noticed that the integrations which were working prior stopped working. Although the URL when triggered through the POSTMAN app it works fine. The error that was received is ' {"The underlying connection was closed: An unexpected error occurred on a send."} ' Pre- requisites : Microsoft Dynamics NAV / Business Central Understanding of .NET Interoperability Postman App Test Endpoint for API Procedure: I have used NAVWebRequest or HTTPWebRequest as .NET interoperability in NAV referring to https://dynamics.is/?p=2739 1. Debugging the issue: In order to make sure that the coding is correctly triggering the URL with POST call and JSON Data Payload, I created an endpoint on Request Bin and the solution seems to be working. Request Bin Also, when triggering the URL through Postman, the response is correctly generated. Postman Trigger 2. Finding the issue and possible solution u