Ahhhh ok, I was unaware of that!  I was a VMS sysadmin for many years 
running 4.7 and 5.x systems, but our (US Gov't related) systems were not 
allowed to be networked, so I never had any experience with that.
   So it actually patches netacp.exe?!  Wow that's nuts!
             -Dave
On 2/21/21 2:39 PM, Peter Allan wrote:
  You are quite correct that LMF did not appear until
VMS version 5. Prior 
 to that you needed to install what was called a DECnet key to let you 
 use DECnet on VMS. I do recall having to do this back when I managed a 
 VAX-11/780 that ran VMS 3.x,and later VMS 4.x. Installing the so-called 
 key actually patches the file NETACP.EXE.
 
 My reference to a license was because?that is actually what the system 
 complains about the lack of when I try to start DECnet. Clearly this is 
 not an LMF license.
 
 Cheers
 
 Peter
 
 
 On Sun, 21 Feb 2021 at 18:43, Dave McGuire <mcguire at 
neurotica.com 
 <mailto:mcguire at neurotica.com>> wrote:
 
     On 2/21/21 12:36 PM, Peter Allan wrote:
  I am trying to get DECnet working on a simulated
VAX 780 (with simh)
 with a 3.x version of VMS. This is largely for nostalgic?reasons.
 I have the version of VMS 3.0 from John Dundas that Supratim posted
 nearly a year ago. I have also built a VMS 3.0 system by 
     installing VMS
  from the VMS 3.0 distribution tape. Both of those
systems seem to
 work?well.
 However I am failing to find a way of getting DECnet working. I 
     have a
  DECnet end node key (and a routing key, come to
that) from
 
http://iamvirtual.ca/VAX11/VAX-11-software.html but that says 
     that it
  only works for VMS 3.4 or later. I did try it on
3.0 anyway, but 
     it did
  not get DECnet to work. It complains?about
needing a license.
 Can anyone help me either upgrade my VMS 3.0 system to VMS 3.4 or 
     higher
  (or just install the higher version from
scratch), or help me find a
 DECnet key that works with VMS 3.0. 
 
      ? ?LMF didn't appear in VMS until v5.0.? Is there some other licensing
     scheme for pre-VMS-5 DECnet that I'm unaware of?? I certainly don't
     remember any.? Lacking that, are you certain the DECnet package you're
     trying to get running is compatible with VMS 3.0?
 
      ? ? ? ? ? ?-Dave
 
     -- 
     Dave McGuire, AK4HZ
     New Kensington, PA