diff --git a/src/natlinkcore/config.py b/src/natlinkcore/config.py
index e10313b..3ac4aff 100644
--- a/src/natlinkcore/config.py
+++ b/src/natlinkcore/config.py
@@ -77,7 +77,7 @@ def from_config_parser(config: configparser.ConfigParser, config_path: str) -> '
         if config.has_section('settings.debugadapterprotocol'):
             dap_settings = config['settings.debugadapterprotocol']
             dap_enabled = dap_settings.getboolean('dap_enabled', fallback=False)
-            dap_port = dap_settings.getint('dap_port', fallback=0)
+            dap_port = dap_settings.getint('dap_port', fallback=7474)
             dap_wait_for_debugger_attach_on_startup= dap_settings.getboolean('dap_wait_for_debugger_attach_on_startup', fallback=False)
 
         ret.dap_enabled,ret.dap_port,ret.dap_wait_for_debugger_attach_on_startup = \
diff --git a/src/natlinkcore/natlinkstatus.py b/src/natlinkcore/natlinkstatus.py
index 5f5745d..dfffe41 100644
--- a/src/natlinkcore/natlinkstatus.py
+++ b/src/natlinkcore/natlinkstatus.py
@@ -603,6 +603,8 @@ def getVocolaGrammarsDirectory(self):
         
         key = 'vocolagrammarsdirectory'
         value =  self.natlinkmain.getconfigsetting(section='directories', option=key)
+        if not value:
+            return ""
         voc_grammars_dir = natlinkcore.config.expand_path(value)
         self.VocolaGrammarsDirectory = voc_grammars_dir
         return voc_grammars_dir
diff --git a/src/natlinkcore/natlinktimer.py b/src/natlinkcore/natlinktimer.py
index 1140753..f5abfb7 100644
--- a/src/natlinkcore/natlinktimer.py
+++ b/src/natlinkcore/natlinktimer.py
@@ -156,7 +156,7 @@ def removeCallback(self, callback, debug=None):
 
         # outside in_timer:
         try:
-            print('remove 1 timer')
+            print(f'natlinktimer, remove timer {callback.__name__}')
             del self.callbacks[callback]
         except KeyError:
             pass
@@ -361,7 +361,7 @@ def removeTimerCallback(callback, debug=None):
     callback: the function to be called
     """
     if not natlinktimer:
-        print(f'no timers active, cannot remove {callback} from natlinktimer')
+        # print(f'no timers active, cannot remove {callback} from natlinktimer')
         return
     
     if callback is None:
diff --git a/src/natlinkcore/natlinkutils.py b/src/natlinkcore/natlinkutils.py
index 1dcc1a7..44e1b05 100644
--- a/src/natlinkcore/natlinkutils.py
+++ b/src/natlinkcore/natlinkutils.py
@@ -42,7 +42,7 @@
 import struct
 import sys
 import traceback
-
+import time
 import natlink
 from natlinkcore import gramparser
 
@@ -1320,4 +1320,14 @@ def debug_print(msg):
     """
     if debugLoad:
         print(msg)
-        
\ No newline at end of file
+        
+if __name__ == "__main__":
+    try:
+        natlink.natConnect()
+        buttonClick('right')
+        time.sleep(1)
+        natlink.playString('{esc}')
+    finally:
+        natlink.natDisconnect()
+    
+    
\ No newline at end of file
diff --git a/tests/test_natlinktimer.py b/tests/test_natlinktimer.py
index f5ea785..00a0846 100644
--- a/tests/test_natlinktimer.py
+++ b/tests/test_natlinktimer.py
@@ -174,6 +174,7 @@ def testStopAtMicOff():
 
         finally:
             natlinktimer.stopTimerCallback()
+            natlink.natDisconnect()
         
 
 # def testStopAtMicOff():