diff --git a/debian/changelog b/debian/changelog
index ee3b4f4..8166be0 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,76 @@
+frappy-core (0.17.11) focal; urgency=medium
+
+  [ Alexander Zaft ]
+  * Add __format__ to EnumMember
+
+  [ Markus Zolliker ]
+  * fix error from manual %-format conversion
+
+  [ Alexander Zaft ]
+  * specify minimum pyqt5 version
+
+  [ Markus Zolliker ]
+  * make io device visible as expert by default
+
+  [ Jens Krüger ]
+  * MLZ/Entangle: Fix formatting issues
+
+  [ Markus Zolliker ]
+  * improve error handling on callbacks
+  * fix issues with lakeshore 370
+  * frappy_psi: two small fixes in k2601b/ppmssim
+  * a playground for debugging drivers
+  * issues with StructOf
+  * improve mercury temperature loop
+  * improve interactive client
+
+  [ Jens Krüger ]
+  * Server: add missing 'restart_hook' missing
+  * MLZ/Entangle: Add unit init in AnalogOutput
+  * MLZ/Entangle: Fix user limits handling
+
+  [ Alexander Zaft ]
+  * Improve address and connection handling
+  * Add Stopgap handling of cfg files in cfg-editor
+
+  [ Markus Zolliker ]
+  * fix in frappy_psi.historywriter
+  * improve mercury driver
+  * driver for the triton dilution refrigerator
+  * fixes on HasConvergence and HasOutputModule
+  * improve and fix errors with parameter limits
+  * add HasOffset feature
+
+  [ Alexander Zaft ]
+  * Fix interface class list
+
+  [ Markus Zolliker ]
+  * mixins should not inherit Module
+  * fix interplay mercury.TemperatureLoop and HasConvergence
+
+  [ Alexander Zaft ]
+  * Fix lower limit checking of FloatRange
+
+  [ Markus Zolliker ]
+  * improve traceback while processing config file
+  * driver for mercury IPS
+  * add sea driver
+
+  [ Georg Brandl ]
+  * debian: add new executable
+
+  [ Markus Zolliker ]
+  * move more code from bin/frappy-cli to frappy/client/interactive.py
+  * add unit=s to pollinterval
+  * client.interactive: fix error when interface_classes empty
+  * phytron motor driver
+  * client: timestamps must never lie in the future
+
+  [ Alexander Zaft ]
+  * Fix rstrip misuse in frappy-generator
+
+ -- Alexander Zaft <jenkins@frm2.tum.de>  Thu, 25 May 2023 09:38:24 +0200
+
 frappy-core (0.17.10) focal; urgency=medium
 
   * Change leftover %-logging calls to lazy
diff --git a/debian/frappy-core.install b/debian/frappy-core.install
index bf4e5a0..afa4e03 100644
--- a/debian/frappy-core.install
+++ b/debian/frappy-core.install
@@ -1,5 +1,6 @@
 usr/bin/frappy-cli
 usr/bin/frappy-server
+usr/bin/frappy-play
 usr/lib/python3.*/dist-packages/frappy/*.py
 usr/lib/python3.*/dist-packages/frappy/lib
 usr/lib/python3.*/dist-packages/frappy/client
diff --git a/etc/frappy-generator b/etc/frappy-generator
index 9cf67b6..d50c226 100755
--- a/etc/frappy-generator
+++ b/etc/frappy-generator
@@ -39,7 +39,7 @@ def main():
     frappy_unit = '/lib/systemd/system/frappy@.service'
     wants_dir = normal_dir + '/frappy.target.wants'
 
-    all_servers = [base.rstrip('_cfg') for (base, ext) in
+    all_servers = [base[:-4] if base.endswith('_cfg') else base for (base, ext) in
                    map(path.splitext, os.listdir(config_dir)) if ext == '.py']
     all_servers.sort()
 
diff --git a/frappy/config.py b/frappy/config.py
index c19cc6a..1b77f15 100644
--- a/frappy/config.py
+++ b/frappy/config.py
@@ -22,10 +22,12 @@
 
 import os
 import re
+from collections import Counter
 
 from frappy.errors import ConfigError
 from frappy.lib import generalConfig
 
+
 class Undef:
     pass
 
@@ -126,7 +128,7 @@ class Config(dict):
                 self.modules.append(mod)
 
 
-def process_file(filename):
+def process_file(filename, log):
     with open(filename, 'rb') as f:
         config_text = f.read()
     node = NodeCollector()
@@ -135,6 +137,13 @@ def process_file(filename):
 
     # pylint: disable=exec-used
     exec(compile(config_text, filename, 'exec'), ns)
+
+    # check for duplicates in the file itself. Between files comes later
+    duplicates = [name for name, count in Counter([mod['name']
+                    for mod in mods.list]).items() if count > 1]
+    if duplicates:
+        log.warning('Duplicate module name in file \'%s\': %s',
+                    filename, ','.join(duplicates))
     return Config(node, mods)
 
 
@@ -177,7 +186,7 @@ def load_config(cfgfiles, log):
     for cfgfile in cfgfiles.split(','):
         filename = to_config_path(cfgfile, log)
         log.debug('Parsing config file %s...', filename)
-        cfg = process_file(filename)
+        cfg = process_file(filename, log)
         if config:
             config.merge_modules(cfg)
         else:
diff --git a/frappy/lib/__init__.py b/frappy/lib/__init__.py
index cf40de1..827ac03 100644
--- a/frappy/lib/__init__.py
+++ b/frappy/lib/__init__.py
@@ -405,8 +405,4 @@ def merge_status(*args):
     texts matching maximal code are joined with ', '
     """
     maxcode = max(a[0] for a in args)
-    # take status value matching highest status code
-    merged = [a[1] for a in args if a[0] == maxcode and a[1]]
-    # merge the split texts. use dict instead of set for keeping order
-    merged = {m: 0 for mm in merged for m in mm.split(', ')}
-    return maxcode, ', '.join(merged)
+    return maxcode, ', '.join([a[1] for a in args if a[0] == maxcode and a[1]])
diff --git a/frappy/params.py b/frappy/params.py
index 526738c..428ed78 100644
--- a/frappy/params.py
+++ b/frappy/params.py
@@ -27,7 +27,7 @@ import inspect
 
 from frappy.datatypes import BoolType, CommandType, DataType, \
     DataTypeType, EnumType, NoneOr, OrType, FloatRange, \
-    StringType, StructOf, TextType, TupleOf, ValueType
+    StringType, StructOf, TextType, TupleOf, ValueType, ArrayOf
 from frappy.errors import BadValueError, WrongTypeError, ProgrammingError
 from frappy.properties import HasProperties, Property
 from frappy.lib import generalConfig
@@ -168,6 +168,9 @@ class Parameter(Accessible):
           or the minimum time between updates of equal values [sec]''',
         OrType(FloatRange(0), EnumType(always=0, never=999999999, default=-1)),
         export=False, default=-1)
+    influences = Property(
+        'optional hint about effected parameters', ArrayOf(StringType()),
+        extname='influences', export=True, mandatory=False, default=[])
 
     # used on the instance copy only
     # value = None
@@ -363,6 +366,9 @@ class Command(Accessible):
     result = Property(
         'datatype of the result from the command, or None', NoneOr(DataTypeType()),
         export=False, mandatory=True)
+    influences = Property(
+        'optional hint about effected parameters', ArrayOf(StringType()),
+        extname='influences', export=True, mandatory=False, default=[])
 
     func = None
 
diff --git a/test/test_datatypes.py b/test/test_datatypes.py
index d3e5160..a4b2c1b 100644
--- a/test/test_datatypes.py
+++ b/test/test_datatypes.py
@@ -658,6 +658,7 @@ def test_get_datatype():
     (FloatRange(-10, 10), FloatRange()),
     (IntRange(-10, 10), FloatRange()),
     (IntRange(-10, 10), IntRange(-20, 10)),
+    (FloatRange(-10, 10), FloatRange(-15, 10)),
     (StringType(), StringType(isUTF8=True)),
     (StringType(10, 10), StringType()),
     (ArrayOf(StringType(), 3, 5), ArrayOf(StringType(), 3, 6)),
diff --git a/test/test_modules.py b/test/test_modules.py
index a6dda8c..7da7853 100644
--- a/test/test_modules.py
+++ b/test/test_modules.py
@@ -28,7 +28,7 @@ import pytest
 
 from frappy.datatypes import BoolType, FloatRange, StringType, IntRange, ScaledInteger
 from frappy.errors import ProgrammingError, ConfigError, RangeError
-from frappy.modules import Communicator, Drivable, Readable, Module
+from frappy.modules import Communicator, Drivable, Readable, Module, Writable
 from frappy.params import Command, Parameter, Limit
 from frappy.rwhandler import ReadHandler, WriteHandler, nopoll
 from frappy.lib import generalConfig
@@ -245,7 +245,7 @@ def test_ModuleMagic():
         'group', 'export', 'relative_resolution',
         'visibility', 'unit', 'default', 'value', 'datatype', 'fmtstr',
         'absolute_resolution', 'max', 'min', 'readonly', 'constant',
-        'description', 'needscfg', 'update_unchanged'}
+        'description', 'needscfg', 'update_unchanged', 'influences'}
 
     # check on the level of classes
     # this checks Newclass1 too, as it is inherited by Newclass2
@@ -902,3 +902,17 @@ def test_limit_inheritance():
 
     with pytest.raises(ValueError):
         mod2.write_a(0)
+
+@pytest.mark.parametrize('bases, iface_classes', [
+    ([Module], ()),
+    ([Communicator], ('Communicator',)),
+    ([Readable], ('Readable',)),
+    ([Writable], ('Writable',)),
+    ([Drivable], ('Drivable',)),
+])
+def test_interface_classes(bases, iface_classes):
+    srv = ServerStub({})
+    class Mod(*bases):
+        pass
+    m = Mod('mod', LoggerStub(), {'description': 'test'}, srv)
+    assert m.interface_classes == iface_classes