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Sometimes a temporary lock file is left behind after a crash, causing the "Exclusive" error.

In the dim glow of the service-room monitor, a terse error blinked across ElsaWin’s interface: "Initialize order server failed — exclusive." To most, it was an IT hiccup: a blocked port, a misapplied lock, a race condition. To Mara, who had been keeping the aging parts catalog alive for fifteen years, it was a sentence that opened a window into a system and a world that refused to stay simple.