diff --git a/runtime/prompty/prompty/__init__.py b/runtime/prompty/prompty/__init__.py
index a931c0f..ec3ac59 100644
--- a/runtime/prompty/prompty/__init__.py
+++ b/runtime/prompty/prompty/__init__.py
@@ -6,6 +6,7 @@
 from prompty.tracer import trace
 from prompty.core import (
     Frontmatter,
+    InvokerException,
     InvokerFactory,
     ModelSettings,
     Prompty,
@@ -321,18 +322,28 @@ def run(
     if parameters != {}:
         prompt.model.parameters = param_hoisting(parameters, prompt.model.parameters)
 
+    invoker_type = prompt.model.configuration["type"]
+
+    # invoker registration check
+    if not InvokerFactory.has_invoker("executor", invoker_type):
+        raise InvokerException(
+            f"{invoker_type} Invoker has not been registered properly.", invoker_type
+        )
+
     # execute
-    executor = InvokerFactory.create_executor(
-        prompt.model.configuration["type"], prompt
-    )
+    executor = InvokerFactory.create_executor(invoker_type, prompt)
     result = executor(content)
 
     # skip?
     if not raw:
+        # invoker registration check
+        if not InvokerFactory.has_invoker("processor", invoker_type):
+            raise InvokerException(
+                f"{invoker_type} Invoker has not been registered properly.", invoker_type
+            )
+        
         # process
-        processor = InvokerFactory.create_processor(
-            prompt.model.configuration["type"], prompt
-        )
+        processor = InvokerFactory.create_processor(invoker_type, prompt)
         result = processor(result)
 
     return result
diff --git a/runtime/prompty/prompty/azure/__init__.py b/runtime/prompty/prompty/azure/__init__.py
index d44688a..be49541 100644
--- a/runtime/prompty/prompty/azure/__init__.py
+++ b/runtime/prompty/prompty/azure/__init__.py
@@ -1,3 +1,10 @@
 # __init__.py
-from .executor import AzureOpenAIExecutor
-from .processor import AzureOpenAIProcessor
+from prompty.core import InvokerException
+
+try:
+    from .executor import AzureOpenAIExecutor
+    from .processor import AzureOpenAIProcessor
+except ImportError:
+    raise InvokerException(
+        "Error registering AzureOpenAIExecutor and AzureOpenAIProcessor", "azure"
+    )
diff --git a/runtime/prompty/prompty/azure_openai/__init__.py b/runtime/prompty/prompty/azure_openai/__init__.py
new file mode 100644
index 0000000..db30357
--- /dev/null
+++ b/runtime/prompty/prompty/azure_openai/__init__.py
@@ -0,0 +1,10 @@
+# __init__.py
+from prompty.core import InvokerException
+
+try:
+    from ..azure.executor import AzureOpenAIExecutor
+    from ..azure.processor import AzureOpenAIProcessor
+except ImportError:
+    raise InvokerException(
+        "Error registering AzureOpenAIExecutor and AzureOpenAIProcessor", "azure"
+    )
diff --git a/runtime/prompty/prompty/core.py b/runtime/prompty/prompty/core.py
index 4c25089..80f6851 100644
--- a/runtime/prompty/prompty/core.py
+++ b/runtime/prompty/prompty/core.py
@@ -343,6 +343,21 @@ class InvokerFactory:
     _executors: Dict[str, Invoker] = {}
     _processors: Dict[str, Invoker] = {}
 
+    @classmethod
+    def has_invoker(
+        cls, type: Literal["renderer", "parser", "executor", "processor"], name: str
+    ) -> bool:
+        if type == "renderer":
+            return name in cls._renderers
+        elif type == "parser":
+            return name in cls._parsers
+        elif type == "executor":
+            return name in cls._executors
+        elif type == "processor":
+            return name in cls._processors
+        else:
+            raise ValueError(f"Type {type} not found")
+
     @classmethod
     def add_renderer(cls, name: str, invoker: Invoker) -> None:
         cls._renderers[name] = invoker
@@ -416,6 +431,17 @@ def create_processor(cls, name: str, prompty: Prompty) -> Invoker:
         return cls._processors[name](prompty)
 
 
+class InvokerException(Exception):
+    """Exception class for Invoker"""
+
+    def __init__(self, message: str, type: str) -> None:
+        super().__init__(message)
+        self.type = type
+
+    def __str__(self) -> str:
+        return f"{super().__str__()}. Make sure to pip install any necessary package extras (i.e. could be something like `pip install prompty[{self.type}]`) for {self.type} as well as import the appropriate invokers (i.e. could be something like `import prompty.{self.type}`)."
+
+
 @InvokerFactory.register_renderer("NOOP")
 @InvokerFactory.register_parser("NOOP")
 @InvokerFactory.register_executor("NOOP")
diff --git a/runtime/prompty/prompty/openai/__init__.py b/runtime/prompty/prompty/openai/__init__.py
index d44688a..e2f4e7f 100644
--- a/runtime/prompty/prompty/openai/__init__.py
+++ b/runtime/prompty/prompty/openai/__init__.py
@@ -1,3 +1,10 @@
 # __init__.py
-from .executor import AzureOpenAIExecutor
-from .processor import AzureOpenAIProcessor
+from prompty.core import InvokerException
+
+try:
+    from .executor import OpenAIExecutor
+    from .processor import OpenAIProcessor
+except ImportError:
+    raise InvokerException(
+        "Error registering OpenAIExecutor and OpenAIProcessor", "openai"
+    )
diff --git a/runtime/prompty/prompty/openai/executor.py b/runtime/prompty/prompty/openai/executor.py
index 19c42ca..a4bd64e 100644
--- a/runtime/prompty/prompty/openai/executor.py
+++ b/runtime/prompty/prompty/openai/executor.py
@@ -7,7 +7,7 @@
 
 
 @InvokerFactory.register_executor("openai")
-class AzureOpenAIExecutor(Invoker):
+class OpenAIExecutor(Invoker):
     """OpenAI Executor"""
 
     def __init__(self, prompty: Prompty) -> None:
diff --git a/runtime/prompty/prompty/openai/processor.py b/runtime/prompty/prompty/openai/processor.py
index bfbf9b3..a615ec7 100644
--- a/runtime/prompty/prompty/openai/processor.py
+++ b/runtime/prompty/prompty/openai/processor.py
@@ -6,7 +6,7 @@
 
 
 @InvokerFactory.register_processor("openai")
-class AzureOpenAIProcessor(Invoker):
+class OpenAIProcessor(Invoker):
     """OpenAI Processor"""
 
     def __init__(self, prompty: Prompty) -> None:
diff --git a/runtime/prompty/prompty/serverless/__init__.py b/runtime/prompty/prompty/serverless/__init__.py
index b49b4bc..679180d 100644
--- a/runtime/prompty/prompty/serverless/__init__.py
+++ b/runtime/prompty/prompty/serverless/__init__.py
@@ -1,3 +1,8 @@
 # __init__.py
-from .executor import ServerlessExecutor
-from .processor import ServerlessProcessor
+from prompty.core import InvokerException
+
+try:
+    from .executor import ServerlessExecutor
+    from .processor import ServerlessProcessor
+except ImportError:
+    raise InvokerException("Error registering ServerlessExecutor and ServerlessProcessor", "serverless")
diff --git a/runtime/prompty/prompty/tracer.py b/runtime/prompty/prompty/tracer.py
index 4d6c6d6..f5f3ed2 100644
--- a/runtime/prompty/prompty/tracer.py
+++ b/runtime/prompty/prompty/tracer.py
@@ -232,7 +232,7 @@ def add(key: str, value: Any) -> None:
             if len(self.stack) == 0:
                 trace_file = (
                     self.output
-                    / f"{frame['name']}.{datetime.now().strftime('%Y%m%d.%H%M%S')}.ptrace"
+                    / f"{frame['name']}.{datetime.now().strftime('%Y%m%d.%H%M%S')}.tracy"
                 )
 
                 v = importlib.metadata.version("prompty")