Show message with error on action failure.

openpype/tools/publisher/control.py

@@ -2329,6 +2329,21 @@ class PublisherController(BasePublisherController):
         result = pyblish.plugin.process(
             plugin, self._publish_context, None, action.id
         )
+        exception = result.get("error")
+        if exception:
+            self._emit_event(
+                "action.failed",
+                {
+                    "title": "Action failed",
+                    "message": "Action failed.",
+                    "traceback": "".join(
+                        traceback.format_exception(exception)
+                    ),
+                    "label": "",
+                    "identifier": action.__name__
+                }
+            )
+
         self._publish_report.add_action_result(action, result)
 
     def _publish_next_process(self):

openpype/tools/publisher/window.py

@@ -321,6 +321,9 @@ class PublisherWindow(QtWidgets.QWidget):
         controller.event_system.add_callback(
             "convertors.find.failed", self._on_convertor_error
         )
+        controller.event_system.add_callback(
+            "action.failed", self._on_action_error
+        )
         controller.event_system.add_callback(
             "export_report.request", self._export_report
         )
@@ -1012,6 +1015,18 @@ class PublisherWindow(QtWidgets.QWidget):
             event["title"], new_failed_info, "Convertor:"
         )
 
+    def _on_action_error(self, event):
+        self.add_error_message_dialog(
+            event["title"],
+            [{
+                "message": event["message"],
+                "traceback": event["traceback"],
+                "label": event["label"],
+                "identifier": event["identifier"]
+            }],
+            "Action:"
+        )
+
     def _update_create_overlay_size(self):
         metrics = self._create_overlay_button.fontMetrics()
         height = int(metrics.height())