Update experiment_data.py

qiskit_experiments/framework/experiment_data.py

@@ -1070,11 +1070,13 @@ def _add_result_data(self, result: Result, job_id: Optional[str] = None) -> None
     def _retrieve_data(self):
         """Retrieve job data if missing experiment data."""
         # Get job results if missing in experiment data.
-        if self.provider is None and not self._result_data.copy():
-            LOG.warning(
-                "provider is None and there is no result data that are stored."
-                " no data was retrieved."
-            )
+        if self.provider is None:
+            if not self._result_data.copy():
+                # Adding warning so the user will have indication why the analysis may fail.
+                LOG.warning(
+                    "provider is None and there is no result data that are stored."
+                    " no data was retrieved."
+                )
             return
         retrieved_jobs = {}
         jobs_to_retrieve = []  # the list of all jobs to retrieve from the server