Party spokesperson Bhakta Charan Das said the state CLP as also the party have decided to boycott the meeting.
At the AICC briefing earlier, Das had, however, said that the party would be attending the meeting apparently unaware of the decision taken by the state unit.
Das had also attacked the state government for not calling such a meeting before the Congress Parivartan Yatra started.
The state unit has maintained that such meetings have no meaning as the state government did nothing to provide security to the Congress leaders.
The decision to convene the all-party meeting had come hours after Congress demanded immediate resignation of the chief minister.