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What can caused an "HTTP Server failed to run on specified port" error when using the Vijeo Design'Air app?

Vijeo Design'Air uses internal port 6002.  That port cannot be changed with Vijeo Designer V6.2  You do not need to configure port 6002 for Vijeo Design'Air.  It is done automatically by enabling Vijeo Design'Air. The external port can be setup to 6002 or something else if you have more than one HMI in the router port forwarding configuration.  The internal port is always 6002.
The Webserver port is usually 80 and should not be changed to 6002 otherwise you will have a port conflict error.
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