The OneClick server failed to connect to the SpectroSERVER and the following errors were seen in the stdout.log file:
Nov 21, 2019 14:50:03.892 - SPC-OCA-10370: The Location Server on <SpectroSERVER Host> is not available.
Nov 21, 2019 14:50:03.892 - Could not reach location server at <SpectroSERVER Host>
The .corbarc and .jcorbarc files on the SpectroSERVER had localhost as the server name instead of the short name of the SpectroSERVER.
Release : 10.4
Component : Spectrum Core / SpectroSERVER
Editing the $SPECROOT/.corbarc and $SPECROOT/.jcorbarc to use the short hostname of the SpectroSERVER instead of localhost and restarting processd resolved the issue.