Print Provider error of "address is not valid in its context"
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Q My Windows Secondary Print Provider fails to connect to the Application Server and I get the following error message in the Print Provider log:
Sep 02 12:24:41 DEBUG: Error initiating connection - The requested address is not valid in its context. (Error: 10049) 
Sep 02 12:24:41 DEBUG: unable to establish TCP connection 
What can I do?
This can mean that the Application Server hostname is having trouble being resolved to an ip address (i.e. a DNS issue). It would be worth trying an ip address for the Application Server instead of hostname by updating the configuration file of [app-path]/providers/print/win/print-provider.conf:
ApplicationServer=[the server's IP address]
Keywords: 100049 WSAEADDRNOTAVAIL DNS secondary-server