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diff --git a/azure/aria/aria-extension-cloudify/src/aria/aria/modeling/exceptions.py b/azure/aria/aria-extension-cloudify/src/aria/aria/modeling/exceptions.py
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+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+Modeling exceptions.
+"""
+
+from ..exceptions import AriaException
+
+
+class ModelingException(AriaException):
+    """
+    ARIA modeling exception.
+    """
+
+
+class ParameterException(ModelingException):
+    """
+    ARIA parameter exception.
+    """
+    pass
+
+
+class ValueFormatException(ModelingException):
+    """
+    ARIA modeling exception: the value is in the wrong format.
+    """
+
+
+class CannotEvaluateFunctionException(ModelingException):
+    """
+    ARIA modeling exception: cannot evaluate the function at this time.
+    """
+
+
+class MissingRequiredInputsException(ParameterException):
+    """
+    ARIA modeling exception: Required parameters have been omitted.
+    """
+
+
+class ParametersOfWrongTypeException(ParameterException):
+    """
+    ARIA modeling exception: Parameters of the wrong types have been provided.
+    """
+
+
+class UndeclaredInputsException(ParameterException):
+    """
+    ARIA modeling exception: Undeclared parameters have been provided.
+    """