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8181
8282**What it means**
8383
84The first message means compute capacity is temporarily busy; the session starts on its own once capacity frees up. The second means the session didn't start at all, which is transient.
84The first message means the session was created and is waiting for capacity to run it. The session normally starts on its own within a few minutes. If your organization runs Claude's sessions on its own infrastructure, the wait lasts until that infrastructure starts the session.
8585
86The second message means the session didn't start at all. The failure is usually temporary.
87
8688**How to resolve**
8789
88* For the capacity message, wait a few minutes; no action is needed. To add context while waiting, @-mention Claude in the same thread rather than starting a new one. A new thread only queues a second session behind the first.
89* For the failed-start message, mention Claude in the same thread to retry. If the retry worked, the session starts and Claude begins the task.
90* For the capacity message, wait a few minutes. To add context while waiting, @-mention Claude in the same thread rather than starting a new one. A new thread only queues a second session behind the first. If Claude still hasn't started after several more minutes, send your admin [Still waiting for available capacity](/docs/claude-tag/admins/troubleshooting#still-waiting-for-available-capacity).
91* For the failed-start message, mention Claude in the same thread to retry. If the session fails to start again, ask an admin.
9092
9193### Claude didn't react to a message I edited
9294