Hi @Frederic

Can the customer connect if they use the 450 example without any changes?
I am not familiar with VPC endpoints etc - however, the section of the RTO install guide does state:
Refinitiv recommends that you use service discovery to connect to Refinitiv Real-Time - Optimized. Using service discovery does not require code changes. Once new VIPs are active, any subsequent service discovery call automatically routes to the correct VIPs. However, others connecting to the end points will need to make appropriate changes.

Example 450 use service discovery - removing the need for the customer to specify a particular endpoint.

We can enable the REST API log to see if that provides any further clues - in terms of the REST API calls that EMA makes to the RDP services.

Please add the following log to EmaConfig.xml; if you are using example 450, it should be added under the Consumer_1 section.

<Consumer>

<Name value="Consumer_1"/>

<ChannelSet value="Channel_1"/>

<Logger value="Logger_1"/>

<Dictionary value="Dictionary_1"/>

<XmlTraceToStdout value="0"/>

<RestEnableLog value="1"/>

<RestLogFileName value="Restlog.txt"/>

</Consumer>

You can find additional config from EMACPP_ConfigGuide.pdf provided under folder Docs from RTSDK package.

Ema should generate Restlog.txt under the running directory; containing the REST API messages EMA sends and receive from the server. Please remove any credentials information before sharing on the forum.

If the customer can also share the console output that would also be useful...