diff --git a/pylot/core/io/inputs.py b/pylot/core/io/inputs.py
index 71888642..be899e30 100644
--- a/pylot/core/io/inputs.py
+++ b/pylot/core/io/inputs.py
@@ -53,10 +53,16 @@ class PylotParameter(object):
         self.__parameter = {}
         self._verbosity = verbosity
         self._parFileCont = {}
+
         # io from parsed arguments alternatively
         for key, val in kwargs.items():
             self._parFileCont[key] = val
         self.from_file()
+
+        # if no filename or kwargs given, use default values
+        if not fnin and not kwargs:
+            self.reset_defaults()
+
         if fnout:
             self.export2File(fnout)
 
diff --git a/pylot/core/util/utils.py b/pylot/core/util/utils.py
index ca0d86fc..c0e20171 100644
--- a/pylot/core/util/utils.py
+++ b/pylot/core/util/utils.py
@@ -51,7 +51,6 @@ def readDefaultFilterInformation():
     :rtype: dict
     """
     pparam = PylotParameter()
-    pparam.reset_defaults()
     return readFilterInformation(pparam)