diff --git a/src/agent_gsm.py b/src/agent_gsm.py
index cf2b56b..e6d67d6 100644
--- a/src/agent_gsm.py
+++ b/src/agent_gsm.py
@@ -35,9 +35,6 @@ TASK_LIST: utils_qualtest.TaskList = utils_qualtest.TaskList()
 # Number of finished calls
 CALL_COUNTER = multiprocessing.Value('i', 0)
 
-# Maximum number of calls to to. Zero means unlimited number of calls.
-CALL_LIMIT = 0
-
 # Find script's directory
 DIR_THIS = Path(__file__).resolve().parent
 DIR_PROJECT = DIR_THIS.parent
@@ -261,7 +258,8 @@ def make_call(target: str):
                         
 
 def perform_answerer():
-    global CALL_LIMIT
+    if CONFIG.PreparedReferenceAudio.exists():
+        os.remove(CONFIG.PreparedReferenceAudio)
 
     # Prepare answering file - this must be prepended with few seconds of silence which can be eatean by call setup procedure
     utils.prepare_reference_file(fname=str(CONFIG.ReferenceAudio), 
@@ -398,9 +396,9 @@ def run_probe():
                         run_caller_task(t)
                         
                         utils.log_verbose(f'Call #{CALL_COUNTER.value} finished')
-                        if CALL_COUNTER.value >= CALL_LIMIT and CALL_LIMIT > 0:
+                        if CALL_COUNTER.value >= CONFIG.TaskLimit and CONFIG.TaskLimit > 0:
                             # Time to exit from the script
-                            utils.log(f'Call limit {CALL_LIMIT} hit, exiting.')
+                            utils.log(f'Call limit {CONFIG.TaskLimit} hit, exiting.')
                             return
 
                     except Exception as err: