diff --git a/spiffworkflow-backend/src/spiffworkflow_backend/exceptions/api_error.py b/spiffworkflow-backend/src/spiffworkflow_backend/exceptions/api_error.py
index 39ab1335..ca8c5125 100644
--- a/spiffworkflow-backend/src/spiffworkflow_backend/exceptions/api_error.py
+++ b/spiffworkflow-backend/src/spiffworkflow_backend/exceptions/api_error.py
@@ -149,7 +149,7 @@ class ApiError(Exception):
             # Note that WorkflowDataExceptions are also WorkflowTaskExceptions
             return ApiError.from_task(
                 error_code,
-                message,
+                message + ". " + str(exp),
                 exp.task,
                 line_number=exp.line_number,
                 offset=exp.offset,
diff --git a/spiffworkflow-backend/src/spiffworkflow_backend/models/message_instance.py b/spiffworkflow-backend/src/spiffworkflow_backend/models/message_instance.py
index 99168ec3..c97c4860 100644
--- a/spiffworkflow-backend/src/spiffworkflow_backend/models/message_instance.py
+++ b/spiffworkflow-backend/src/spiffworkflow_backend/models/message_instance.py
@@ -6,6 +6,7 @@ from typing import Optional
 from typing import TYPE_CHECKING
 
 from SpiffWorkflow.bpmn.PythonScriptEngine import PythonScriptEngine  # type: ignore
+from flask import current_app
 from sqlalchemy import ForeignKey
 from sqlalchemy.event import listens_for
 from sqlalchemy.orm import relationship
@@ -135,10 +136,15 @@ class MessageInstanceModel(SpiffworkflowBaseDBModel):
                 result = expression_engine._evaluate(
                     correlation_key.retrieval_expression, payload
                 )
-            except Exception:
+            except Exception as e:
                 # the failure of a payload evaluation may not mean that matches for these
                 # message instances can't happen with other messages.  So don't error up.
                 # fixme:  Perhaps log some sort of error.
+                current_app.logger.warning(
+                    "Error evaluating correlation key when comparing send and receive messages." +
+                    f"Expression {correlation_key.retrieval_expression} failed with the error " +
+                    str(e)
+                )
                 return False
             if result != expected_value:
                 return False
diff --git a/spiffworkflow-backend/src/spiffworkflow_backend/services/process_instance_processor.py b/spiffworkflow-backend/src/spiffworkflow_backend/services/process_instance_processor.py
index 8cd663af..6e1e43eb 100644
--- a/spiffworkflow-backend/src/spiffworkflow_backend/services/process_instance_processor.py
+++ b/spiffworkflow-backend/src/spiffworkflow_backend/services/process_instance_processor.py
@@ -318,19 +318,15 @@ class CustomBpmnScriptEngine(PythonScriptEngine):  # type: ignore
 
     def __get_augment_methods(self, task: Optional[SpiffTask]) -> Dict[str, Callable]:
         """__get_augment_methods."""
-        tld = current_app.config["THREAD_LOCAL_DATA"]
-
+        tld = current_app.config.get("THREAD_LOCAL_DATA")
         if not hasattr(tld, "process_model_identifier"):
-            raise MissingProcessInfoError(
-                "Could not find process_model_identifier from app config"
-            )
+            process_model_identifier = None
+        else:
+            process_model_identifier = tld.process_model_identifier
         if not hasattr(tld, "process_instance_id"):
-            raise MissingProcessInfoError(
-                "Could not find process_instance_id from app config"
-            )
-
-        process_model_identifier = tld.process_model_identifier
-        process_instance_id = tld.process_instance_id
+            process_instance_id = None
+        else:
+            process_instance_id = tld.process_instance_id
         script_attributes_context = ScriptAttributesContext(
             task=task,
             environment_identifier=current_app.config["ENV_IDENTIFIER"],