diff --git a/base.py b/base.py
index 0d0fbca..ad85336 100644
--- a/base.py
+++ b/base.py
@@ -99,9 +99,16 @@ class Config:
     def __init__(self):
         configfile = Path('/sq_sw/linse/etc/linsetools.cfg')
         self.sections = read_config(configfile)
+        if Path('/home/l_samenv').is_dir():
+            for section_name, section in self.sections.items():
+                for key, value in section.items():
+                    if value.startswith('/home/linse'):
+                        section[key] = value.replace('/home/linse', '/home/l_samenv')
         instconfig = Path('/home/linse/.config/instrument.cfg')
         if not instconfig.is_file():
-            instconfig = Path('/home/l_samenv/.config/instrument.cfg')
+            cfg = Path('/home/l_samenv/.config/instrument.cfg')
+            if cfg.is_file():
+                instconfig = cfg
         if instconfig.is_file():
             self.instruments = read_config(instconfig)
         else:
@@ -147,7 +154,6 @@ class Logger:
         method = log.show
         for lev in log.levels:
             setattr(log, lev, method)
-            print(lev, level)
             if lev == level:
                 method = log.hide
         return log
@@ -213,8 +219,7 @@ class MarcheControl:
     def connect(self):
         if self._client is None:
             if self.user == 'l_samenv':
-                x = 1
-                arg = f'{2**4+x}lns{x}'
+                arg = ''
             else:
                 arg = self.user.upper() + 'LNS'
             self._client = Client(self.host, self.port, self.user, arg)
@@ -277,10 +282,15 @@ class MarcheControl:
         config = Config()
         argdict = config.parse_args(cls.argmap, args, cls.otherarg)
         instrument = argdict.pop('instrument', None)
-        if instrument is None and argdict.get('action') == 'list':  # TODO: make more generic if needed
+        if instrument is None:
             instruments = list(config.instruments)
+            if len(instruments) != 1:
+                if argdict.get('action') != 'list':  # TODO: make more generic if needed
+                   raise ValueError('missing instrument')
+                instruments[1:] = []
         else:
             instruments = [instrument]
         for ins in instruments:
+            print('---', ins)
             control = cls(ins, config=config)
             control.do(**argdict)
diff --git a/frappy.py b/frappy.py
index e344929..ee2ab0b 100644
--- a/frappy.py
+++ b/frappy.py
@@ -11,7 +11,7 @@ overrideNode(interface=interface)
 WRAPPER_PAT = re.compile(r"interface\s=\s*'(\d*)'\s*\n")
 
 
-class Config:
+class FrappyConfig:
     log = None
     process_file = None
 
@@ -37,9 +37,9 @@ class FrappyControl(MarcheControl):
         superconfig = self.config.sections['superfrappy']
         self.instance = instance
 
-        self.wrapperdir = superconfig.pop('wrapperdir')
-        self.cfgdirs = superconfig.pop('cfgdirs')
-        frappy_ports = self.ins_config.get('frappy_ports')
+        self.wrapperdir = superconfig.get('wrapperdir')
+        self.cfgdirs = superconfig.get('cfgdirs')
+        frappy_ports = self.ins_config.get('frappy_ports', '0')
         ports = frappy_ports.split('-')
         self.frappy_ports = list(range(int(ports[0]), int(ports[-1])))
         self.frappy_servers = [f'{host}:{p}' for p in self.frappy_ports]
@@ -52,7 +52,8 @@ class FrappyControl(MarcheControl):
         return f'frappy.{instance}' if self.instance == 'this' else f'frappy.{self.instrument}-{instance}'
 
     def wrapper_file(self, cfg):
-        return Path(self.wrapperdir) / f'{cfg}_cfg.py'
+        prefix = "" if self.instrument == 'this' else f'{self.instrument}-'
+        return Path(self.wrapperdir) / f'{prefix}{cfg}_cfg.py'
 
     def cfg_file(self, cfgdirs, service, cfg):
         if '/' in cfg:
@@ -110,7 +111,7 @@ class FrappyControl(MarcheControl):
         if log is None:
             log = Logger('info')
         log.info('add %r port=%r', cfg, port)
-        service, cfgfile = self.cfg_file(self.cfgdirs, service, cfg)
+        servicedir, cfgfile = self.cfg_file(self.cfgdirs, service, cfg)
         if not port:
             if not service:
                 raise ArgError('service is not given and can not be determined from cfg file location')
@@ -187,7 +188,7 @@ class FrappyControl(MarcheControl):
 
     @staticmethod
     def get_cfg_details(cfgfile):
-        mods = Config.get(cfgfile)
+        mods = FrappyConfig.get(cfgfile)
         node = mods.pop('node') or {}
         sea_cfg = None
         for mod, config in mods.items():