By default Arc will detect and show all TM1 instances available on the server where Arc is installed and on any adminhosts defined in the settings.yml file.

The instancestohide setting in the settings.yml file allows you to hide instances that have been returned from the admin host but shouldn’t be displayed in Arc.

Useful if you don’t want to wait for Arc to connect to the instance because it may be unavailable, i.e. the port is blocked.

For example to hide the TM1 instances dev and prod, it can be set in two ways:

instancestohide: [dev, prod] 

or

instancestohide:   
  - dev   
  - prod

Once the setting updated, save the settings.yml file and refresh Arc (do not forget to clear the cache with SHIFT+F5).