upgrade unlang from 2.1.12 to 3.0.14

[adrian.p.smith at bt.com]

We have a fairly complex configuration running on an ageing 2.1.12 version of FreeRadius.

We are looking to upgrade to latest 3.0.14 for various reasons.

I'm having some issues with some of the unlang and would be grateful for some clarification please?

We have config similar to:

if ( !(Cisco-SSG-Service-Info) && ("%{Tunnel-Type}" != "VLAN") ) {
  ...
}

and

if ( ("%{Acct-Status-Type}" == "Stop") && ("%{Tunnel-Type}" == "VLAN") && ("%{client:operator}" != "WLC") ) {
  ...
}

But are seeing error messages such as:

ERROR: Failed retrieving values required to evaluate condition

So questions are:

1. Testing presence of an attribute I think is now "if ( &Cisco-SSG-Service-Info )" ?
2. Can I test presence of and value of an attribute of a variable at the same time, i.e. "if (&Cisco-SSG-Service-Info = "fred" )" ?
3. How can I now do "client:operator" ?

Thanks

Adrian