How to allocate the needed nodes of an experiment?

[haifengjia]

• Platform: Ubuntu 22.04
• Python: 3.10.5
• arm-none-eabi-gcc: 9.3.1
• Board: nRF52 DKs

In the README, in terms of how to prepare for an experiment, it is said

the needed nodes in the iotlab are allocated

I have checked into the source codes of how to flash and how to find the nodes, but got no idea how to specify my own boards to the program. If I run ./exp.py exp/exp_putnon_statconn-static_1s1h39b_i75.yml, the program will raise an error as follows:

WARNING:root:#### TRY #1 ####
WARNING:root:# STEP 2: initialize and allocate experiment
WARNING:root:- Experiment ID: 369833
WARNING:root:- ... waiting for experiment to start
WARNING:root:- Experiment was started
WARNING:root:# STEP 3: flashing nodes
WARNING:root:# STEP 4: run experiment
/home/ethanjia/.local/lib/python3.10/site-packages/libtmux/server.py:633: UserWarning: Server.find_where() is deprecated
  warnings.warn("Server.find_where() is deprecated")
/home/ethanjia/.local/lib/python3.10/site-packages/libtmux/server.py:633: UserWarning: Server.find_where() is deprecated
  warnings.warn("Server.find_where() is deprecated")
/home/ethanjia/.local/lib/python3.10/site-packages/libtmux/session.py:635: UserWarning: Session.find_where() is deprecated
  warnings.warn("Session.find_where() is deprecated")
WARNING:root:- power cycling nodes
WARNING:root:- running the serial aggregator now
WARNING:root:- Error: nodes missing in log: ['nrf52dk-1', 'nrf52dk-2', 'nrf52dk-3', 'nrf52dk-4', 'nrf52dk-5', 'nrf52dk-6', 'nrf52dk-7', 'nrf52dk-8', 'nrf52dk-9', 'nrf52dk-10', 'nrf52840dk-6', 'nrf52840dk-7', 'nrf52840dk-8', 'nrf52840dk-9', 'nrf52840dk-10']
WARNING:root:# Exp run failed:
WARNING:root:# Experiment aborted - no log written
WARNING:root:# Re-running the experiment, wish me luck ;-)

Is it supposed for me to specify the boards' JLink IDs somewhere? Could any one help me with this?