diff --git a/csaxs_bec/bec_ipython_client/plugins/flomni/flomni.py b/csaxs_bec/bec_ipython_client/plugins/flomni/flomni.py
index 101d00b..a8ddc0a 100644
--- a/csaxs_bec/bec_ipython_client/plugins/flomni/flomni.py
+++ b/csaxs_bec/bec_ipython_client/plugins/flomni/flomni.py
@@ -3353,8 +3353,28 @@ class Flomni(
                 " acquisition at this angle use tomo_acquire_at_angle(angle) instead.\x1b[0m"
             )
             if not self.OMNYTools.yesno("Run a fermat scan anyway?", "n"):
-                print("Aborted. Use tomo_acquire_at_angle(angle) for a single-point acquisition.")
-                return
+                # Raise, don't silently return: this runs inside
+                # tomo_scan()'s per-angle loop (directly, or via a custom
+                # at_each_angle hook) as often as not, and a bare `return`
+                # here means the projection that was supposed to happen
+                # simply never did -- no exception, no incomplete status,
+                # no trace that data is now missing from the tomogram. A
+                # real incident: a hook that called this without
+                # _internal=True got asked at every angle, declining just
+                # skipped each one silently, and the eventual Ctrl-C (which
+                # tomo_queue_execute()'s `except Exception` does NOT catch,
+                # since KeyboardInterrupt isn't an Exception) left the job
+                # stuck at status "running" forever with no process behind
+                # it. Raising here means a decline now correctly fails the
+                # job, marks it "incomplete", and pauses the queue --
+                # exactly the crash-resume contract tomo_queue_execute()
+                # already documents.
+                raise FlomniError(
+                    "tomo_scan_projection: declined to run a Fermat scan while "
+                    "single_point_instead_of_fermat_scan is on. Use "
+                    "tomo_acquire_at_angle(angle) for a single-point acquisition, "
+                    "or pass _internal=True to force the Fermat scan without asking."
+                )
 
         dev.rtx.controller.laser_tracker_check_signalstrength()