diff --git a/LoopStructural/interpolators/__init__.py b/LoopStructural/interpolators/__init__.py
index 7fdc3ade..56e68480 100644
--- a/LoopStructural/interpolators/__init__.py
+++ b/LoopStructural/interpolators/__init__.py
@@ -83,8 +83,16 @@ class InterpolatorType(IntEnum):
 try:
     from ..interpolators._surfe_wrapper import SurfeRBFInterpolator
 except ImportError:
-    logger.warning("Surfe is not installed, SurfeRBFInterpolator will not be available")
-    SurfeRBFInterpolator = None
+    class SurfeRBFInterpolator(GeologicalInterpolator):
+        """
+        Dummy class to handle the case where Surfe is not installed.
+        This will raise a warning when used.
+        """
+
+        def __init__(self, *args, **kwargs):
+            raise ImportError(
+                "Surfe cannot be imported. Please install Surfe. pip install surfe/ conda install -c loop3d surfe"
+            ) 
 interpolator_map = {
     InterpolatorType.BASE: GeologicalInterpolator,
     InterpolatorType.BASE_DISCRETE: DiscreteInterpolator,
diff --git a/LoopStructural/modelling/__init__.py b/LoopStructural/modelling/__init__.py
index 4e3e30d0..c25e12f0 100644
--- a/LoopStructural/modelling/__init__.py
+++ b/LoopStructural/modelling/__init__.py
@@ -22,6 +22,14 @@
 try:
     from ..modelling.input.project_file import LoopProjectfileProcessor
 except (LoopImportError, ImportError):
-    logger.warning(
-        "Cannot use LoopProjectfileProcessor: Loop project file cannot be imported, try installing LoopProjectFile"
-    )
+    class LoopProjectfileProcessor(ProcessInputData):
+        """
+        Dummy class to handle the case where LoopProjectFile is not installed.
+        This will raise a warning when used.
+        """
+
+        def __init__(self, *args, **kwargs):
+            raise LoopImportError(
+                "LoopProjectFile cannot be imported. Please install LoopProjectFile."
+            )
+