I have an RF suite setup as follows:

Suite_folder
  |- __init__.robot
  |-
    -Resources
    | |-myresources.robot
    |-test_cases1.robot
    |-test_cases2.robot

I intialise some suite variables in init.robot as follows:

*** Settings ***
...
Suite Setup    Prepare Test Run
*** Variables ***
@{KC_Access_Tokens}     # List that will contain the tokens needed for the suite
@{KC_Tokens_Claims}     # List that will contain the claims for all the tokens

*** Keywords ***
Prepare Test Run
    set suite variable    @{KC_Access_Tokens}    token1    token2    token3
    set suite variable    @{KC_Tokens_Claims}    claim1    claim2    claim3

When I run the suite, Prepare Test Run executes and I can see that the two lists are initialised correctly. However, both lists are empty when I try to use the inside a test case. E.g. if I check their value in test_cases1.robot:

*** Keywords ***
Prepare Test Run
    log    ${KC_Access_Tokens}
    log    ${KC_Tokens_Claims}

KC_Access_Tokens and KC_Tokens_Claims are reported empty.

Is it not possible to initialise suite variables inside init.robot?