diff --git a/light9/effect/effecteval2.py b/light9/effect/effecteval2.py
--- a/light9/effect/effecteval2.py
+++ b/light9/effect/effecteval2.py
@@ -1,3 +1,4 @@
+import traceback
 import inspect
 import logging
 from dataclasses import dataclass
@@ -38,7 +39,7 @@ class EffectEval2:
         self.graph.addHandler(self._compile)
 
     def _compile(self):
-        self.effectFunction = None
+        self.config = None
         if not self.graph.contains((self.uri, RDF.type, L9['Effect'])):
             return
 
@@ -75,7 +76,7 @@ class EffectEval2:
             self.config = Config(effectFunction, esettings, devSettings, func, funcArgs)
         except Exception:
             log.error(f"while compiling {self.uri}")
-            raise
+            traceback.print_exc()
 
     def compute(self, songTime: float, inputs: EffectSettings) -> DeviceSettings:
         """