This message means, that server-side Atelier API -- web-application /api/atelier -- is configured with only Unauthenticated access. So, even though you put Username/Password in Server connection dialog, they are cannot be used, as server-side configuration does not allow this.

To allow password authentication, open Management Portal, then go to Menu (top-left corner) -> Manage Web Applications -> [api/atelier].

Put checkbox near Password in "Allowed Authentication Methods". Save the web application

If Audit is enabled
and LoginFailure and Protect events are enabled
and there is no audit event recorded when you enter username/password and see error after clicking OK.

then I would say that connection attempt from Studio does not reach HealthShare.

Can you do telnet on port 1972 from the computer where you have Studio? Instead of server specify IP-address of server with HealthShare

C:\temp>telnet server 1972
  Connecting To server...

You might use $ZEOF to check for file end.

It should be enabled first:

do $system.Process.SetZEOF(1)

Then you can read file line-by-line as follows:

  do $system.Process.SetZEOF(1)
  set filename = "c:\temp\qq.txt"
  open filename:"R":2
  if '$Test {
    write "cannot open file ", filename, !
    quit
  }
  for  {
    use filename read str
    quit:$ZEOF=-1
    use $Principal write str,!
  }
  close filename

To autofill password fields, Atelier (Eclipse) stores password that developer enters in different wizards. For example password for connection to Caché, password for connection to Git repository, etc. Atelier stores passwords in secure place called secure storage. Passwords are stored in encrypted form.

Access to the secure storage is protected by master password.

So, when you open some wizard with password field first time after Atelier lunch Atelier asks for master password in order to get password from secure storage and autofill corresponding field.

Let us know what exactly you don't understand and I (or maybe someone else) else will try to explain it.