If some of the described configuration steps have not been done correctly (for example, editing of the incorrect configuration files, or if not all TREX hosts had been stopped), the following errors may occur.
TREX Does not Start Completely
Typically, the TREX name server does not start if it detects a incorrect configuration.
In this case, do the following:
In the output of these services you can view the incorrect host names.
Old and New TREX Host Name Displayed in TREX Admin Tool
topology → host → < old_hostname>.