[OPCUA] validation errors: (member: URL, message: The OPC UA Server URL must be unique)

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Hello , My friends. I am using MQTT and OPCUA to automatically subscribe to server messages after the program starts. I set the microflow that needs to be called in AppSetting- > Runtime- > After startup   . If there is only MQTT, it can run normally. If there is an OPCUA, an exception will be thrown. I want to connect to the OPCUA server automatically after the program starts What do I need to do ? Thanks.  
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1 answers
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My advice would be to take the following steps;

  1. Take the Mendix Rapid developer learning path: https://academy.mendix.com/link/path/31/Become-a-Rapid-Developer
  2. Build some stand alone app to understand really how Mendix works
  3. read some documentation; i.e. https://docs.mendix.com/howto/extensibility/howto-connector-kit
  4. Go make it.
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