Eclipse error during "attach to process" operation

Hi, I've a problem with the configuration of Eclipse, to debug Sage X3 programs.

I downloaded Eclipse Indigo, as suggested by the support center.

I set up both Eclipse and Sage user for connect the IDE with the client. I chose the port 10000, and I set it to both Eclipse and Sage X3 user.

Into Eclipse, I added new Sage X3 Project: during this operation, the connection to the Sage X3 server work correctly and Eclipse can reach the server and the programs file. Infact, I opened the sales order program file, from eclipse.

Unfortunately, the last step didn't work: I tried to attach Eclipse to X3, choosing the session from the list shown by Eclipse, like the image below,

I choose the session with my client name (matteos-nb) and, after press attach button, the result was the seguent:

System error (25).

What's mean?

What can I do for resolve this problem and start debugging?

My system reference are:

- Windows 10

- Sage ERP X3 v6.5

- Client: CLI.116 25/9/2015, App. 165 rel. 35 patch 0 - 16v.003

- Eclipse Indago 2019-03 (4.11.0)