[firebird-support] ISC ERROR CODE:335544721

[Michel LE CLEZIO mlcvi...@yahoo.fr [firebird-support]]

Hello,
I have an ISC ERROR CODE:335544721
This is the message : 
ISC ERROR CODE:335544721ISC ERROR MESSAGE:
Unable to complete network request to host "MYCOMPUTER".Failed to locate host 
machineUndefined service gds_db/tcp
MYCOMPUTER : a Win 10 64bitsFirebird 2.58
Application written with Delphi +IBO
The database is a local database...on MYCOMPUTER
port 3050 tcp is open in enter and out…
Do you have an idea of what I have to do ?
With best regards,Mike