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ecc53d9415
Two related fixes for LAN printing with newer Bambu networking plugins: 1. FileTransferUtils: guard against missing ft_tunnel_* symbols The eMMC tunnel constructor calls ft_tunnel_create / ft_tunnel_set_status_cb without checking if the plugin exported them. Older plugins (e.g. 01.10.01.01) don't have these symbols, so the calls dereference null and crash when sending a print. Now throw a clear exception so callers can fall back gracefully. 2. PrintJob: disable eMMC print path by default Plugin 02.03.00.62's eMMC tunnel code hangs indefinitely at the upload phase (30%) on Bambu H2D, blocked inside the plugin waiting on a future that never resolves. Cancel doesn't work because the plugin doesn't check cancel_fn during the wait. The plain FTP path works reliably. Default to try_emmc_print=false; opt-in via AppConfig setting "disable_emmc_print" = "0". Also wrap the eMMC tunnel creation in try/catch so a missing-plugin exception cleanly falls back to FTP instead of killing the worker thread. Co-authored-by: hyiger <hyiger@gmail.com> Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com> Co-authored-by: SoftFever <softfeverever@gmail.com>