Exposing error when boundary is missing compared to metadata (#1357) (#1358)

Co-authored-by: Ben <106089368+benflexcompute@users.noreply.github.com>

Author: github-actions[bot]

flow360/component/simulation/primitives.py

@@ -24,6 +24,7 @@
 from flow360.component.simulation.user_code.core.types import ValueOrExpression
 from flow360.component.simulation.utils import model_attribute_unlock
 from flow360.component.types import Axis
+from flow360.exceptions import Flow360BoundaryMissingError
 
 
 def _get_boundary_full_name(surface_name: str, volume_mesh_meta: dict[str, dict]) -> str:
@@ -43,11 +44,14 @@ def _get_boundary_full_name(surface_name: str, volume_mesh_meta: dict[str, dict]
                 return existing_boundary_name
     if surface_name == "symmetric":
         # Provides more info when the symmetric boundary is not auto generated.
-        raise ValueError(
+        raise Flow360BoundaryMissingError(
             f"Parent zone not found for boundary: {surface_name}. "
-            + "It is likely that it was never auto generated because the condition is not met."
+            "It is likely that it was never auto generated because the condition is not met."
         )
-    raise ValueError(f"Parent zone not found for surface {surface_name}.")
+    raise Flow360BoundaryMissingError(
+        f"Parent zone not found for surface {surface_name}. "
+        "It may have been deleted due to overlapping with generated symmetry plane."
+    )
 
 
 def _check_axis_is_orthogonal(axis_pair: Tuple[Axis, Axis]) -> Tuple[Axis, Axis]:

flow360/exceptions.py

@@ -41,6 +41,10 @@ class Flow360ValidationError(Flow360Error):
     """Error when constructing FLow360 components."""
 
 
+class Flow360BoundaryMissingError(Flow360Error):
+    """Error when a boundary in simulation.json is not found in mesh metadata"""
+
+
 class Flow360ErrorWithLocation(Exception):
     """
     Error with metadata on where the error is in the SimulationParams.