If you need to set both properties, set UseTLS first, then set Port if you need to use a different value then what Indy assigned. Setting the UseTLS property can actually change the Port value. The issue you are seeing has nothing to do with the DLLs, since they are not invoked until after the underlying socket connection is established first (however, you can use Indy's IdOpenSSLSetLibPath() function in the IdSSLOpenSSLHeaders unit to tell Indy where the DLLs are located, if needed).ĭouble-check the Port property when calling Connect(). There should be no difference in how Indy manages its sockets in Debug vs Release builds. There is no way to differentiate between the two possibilities on the client side.

You tried to connect to an IP/Port that is listening for connections, but does not have any available slots to accept new client connections at that particular moment. You tried to connect to an IP/Port that is not listening for connections at all.

Socket error 10061 means one of two things:

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