working version

python_app/gui/controllers/app_window_preprocess_mixin.py

@@ -480,10 +480,10 @@ class AppWindowPreprocessMixin:
 
         try:
             capture_result = session.capture_current_combo()
-            self._record_preprocess_capture(session, capture_result)
         except Exception as exc:  # noqa: BLE001
-            self._show_exception("Failed to capture preprocess combo", exc)
-            self._abort_capture_sequence()
+            self._on_capture_combo_failed(session, exc)
+            return
+        self._record_preprocess_capture(session, capture_result)
 
     def _capture_all_remaining(self) -> None:
         """Capture all remaining combos for the active preprocess session."""
@@ -505,13 +505,36 @@ class AppWindowPreprocessMixin:
             f"{display_name} batch capture started: remaining="
             f"{session.state().total_count - session.state().captured_count}"
         )
-        try:
-            while not session.is_complete():
+        while not session.is_complete():
+            try:
                 capture_result = session.capture_current_combo()
-                self._record_preprocess_capture(session, capture_result)
-        except Exception as exc:  # noqa: BLE001
-            self._show_exception("Failed to capture preprocess combo", exc)
-            self._abort_capture_sequence()
+            except Exception as exc:  # noqa: BLE001
+                self._on_capture_combo_failed(session, exc)
+                return
+            self._record_preprocess_capture(session, capture_result)
+
+    def _on_capture_combo_failed(
+        self,
+        session: SequentialCaptureSession | MultiRadarSequentialCaptureSession,
+        exc: BaseException,
+    ) -> None:
+        """Report a failed combo capture while preserving the session and prior captures."""
+        state = session.state()
+        combo = state.current_combo
+        combo_text = (
+            f"input={combo.input}, output={combo.output}" if combo is not None else "<unknown>"
+        )
+        self._show_exception(
+            f"Failed to capture combo {combo_text}; previous captures kept, retry when ready",
+            exc,
+        )
+        display_name = preprocess_asset_display_name(session.kind)
+        dialog = self._ensure_preprocess_dialog()
+        dialog.set_status(
+            f"{display_name} capture failed at {combo_text}: "
+            f"{state.captured_count}/{state.total_count} kept, ready to retry"
+        )
+        self._update_capture_dialog_state()
 
     def _record_preprocess_capture(
         self,
@@ -696,7 +719,11 @@ class AppWindowPreprocessMixin:
             next_output=next_output,
             can_undo=state.can_undo,
             can_finalize=state.is_complete,
-            can_capture_all=(not state.is_complete and state.current_combo is not None),
+            can_capture_all=(
+                state.supports_batch_capture
+                and not state.is_complete
+                and state.current_combo is not None
+            ),
             variant_count=state.variant_count,
         )