Event subprocess don't catch system fault

Hello, I have problems with my process and error handling when the exception is thrown inside a reusable process.

I have a parent process that implements an event sub-process for error handling. This event subprocess is configured to catch all system exceptions.

From the parent process I invoke a reusable process through a "call activity", inside the reusable process, a SOAP service is invoked. This service for a server update, was offline.

The moment an instance reached the service task, the following error is thrown.

javax.ws.rs.ProcessingException: java.net.ConnectException: Tried all: '1' addresses, but could not connect over HTTP to server: 'some_host', port: '7777'
 failed reasons:
  [0] address:'some_host/some_ip',port:'7777' : java.net.ConnectException: Connection refused