Running a G3 / AX server with version 3.8 on a Windows 8.0 host.
After a recent upgrade to Windows 8.1, the Niagara hostId was changed.
Niagara G3 / AX 3.8
Recent operating system upgrade
Add the following line to the nre.properties fie: disableHostIdGeneration=true
right after "softjace=false"