[SDK]raise proper error when output's empty (#259)

# Description

Please add an informative description that covers that changes made by
the pull request and link all relevant issues.

# All Promptflow Contribution checklist:
- [ ] **The pull request does not introduce [breaking changes]**
- [ ] **CHANGELOG is updated for new features, bug fixes or other
significant changes.**
- [ ] **I have read the [contribution guidelines](../CONTRIBUTING.md).**

## General Guidelines and Best Practices
- [ ] Title of the pull request is clear and informative.
- [ ] There are a small number of commits, each of which have an
informative message. This means that previously merged commits do not
appear in the history of the PR. For more information on cleaning up the
commits in your PR, [see this
page](https://github.com/Azure/azure-powershell/blob/master/documentation/development-docs/cleaning-up-commits.md).

### Testing Guidelines
- [ ] Pull request includes test coverage for the included changes.

src/promptflow/promptflow/_sdk/operations/_run_submitter.py

@@ -329,10 +329,14 @@ def _resolve_data(self, run: Run):
         for input_key, local_file in input_dicts.items():
             result[input_key] = load_data(local_file)
         if run.run is not None:
-            variant_output = reverse_transpose(self.run_operations._get_outputs(run.run))
-            result["run.outputs"] = variant_output
-            variant_input = reverse_transpose(self.run_operations._get_inputs(run.run))
-            result["run.inputs"] = variant_input
+            referenced_outputs = self.run_operations._get_outputs(run.run)
+            if referenced_outputs:
+                variant_output = reverse_transpose(referenced_outputs)
+                result["run.outputs"] = variant_output
+            referenced_inputs = self.run_operations._get_inputs(run.run)
+            if referenced_inputs:
+                variant_input = reverse_transpose(referenced_inputs)
+                result["run.inputs"] = variant_input
         return result
 
     @classmethod

src/promptflow/tests/sdk_cli_test/e2etests/test_flow_run.py

@@ -283,6 +283,28 @@ def test_run_reference_failed_run(self, pf):
         with pytest.raises(RunNotFoundError):
             pf.runs.get(name=run_name)
 
+    def test_referenced_output_not_exist(self, pf):
+        # failed run won't generate output
+        failed_run = pf.run(
+            flow=f"{FLOWS_DIR}/failed_flow",
+            data=f"{DATAS_DIR}/webClassification1.jsonl",
+            column_mapping={"text": "${data.url}"},
+        )
+
+        run_name = str(uuid.uuid4())
+        with pytest.raises(MappingSourceNotFound) as e:
+            pf.run(
+                name=run_name,
+                run=failed_run,
+                flow=f"{FLOWS_DIR}/failed_flow",
+                column_mapping={"text": "${run.outputs.text}"},
+            )
+        assert "Couldn't find these mapping relations: ${run.outputs.text}." in str(e.value)
+
+        # run should not be created
+        with pytest.raises(RunNotFoundError):
+            pf.runs.get(name=run_name)
+
     def test_connection_overwrite_file(self, local_client, local_aoai_connection):
         run = create_yaml_run(
             source=f"{RUNS_DIR}/run_with_connections.yaml",