In the previous section, the multiplex coordinator was started in single node mode (-iqmpx_sn) and read-only (-iqro) to perform some initial database checks. For coordinators, the server needs to reset an identity cookie before the multiplex can be used.
Once you successfully restart the coordinator with iqro 1 and iqmpx_sn 1, shut it down and restart it without any special switches.
start_iq @params.cfg -n mpx_main -iqmpx_ov 1 -x 'tcpip{port=62631}' /workserver/work/iq-127/mpx/main.db