diff --git a/appPublic/registerfunction.py b/appPublic/registerfunction.py
index a932ea3..98db70c 100755
--- a/appPublic/registerfunction.py
+++ b/appPublic/registerfunction.py
@@ -1,4 +1,4 @@
-
+from inspect import isfunction, isroutinefunction
 from functools import partial
 from appPublic.Singleton import SingletonDecorator
 
@@ -8,6 +8,9 @@ class RegisterFunction:
 		self.registKW = {}
 
 	def register(self,name,func):
+		if not isfunction(func) and not isroutinefunction(func):
+			error(f'RegisterFunction.register({name}, {func}): func is not a function or routine')
+			return
 		self.registKW[name] = func
 	
 	def get(self,name):