diff --git a/main_sim.py b/main_sim.py
index edba41a..0d350dc 100644
--- a/main_sim.py
+++ b/main_sim.py
@@ -194,8 +194,9 @@ def run(self, skip_to_time=-1):
             try:
                 val = getattr(self.h, var)[0].soma.cai
             except AttributeError as e:
-                print(e)
+                print("Problem passing neuronal output of %s to muscle in Sibernetic: %s"%(var, e))
                 continue
+                val = 0
             scaled_val = self._scale(val)
             values.append(scaled_val)
             vars_read.append(var)
@@ -206,7 +207,8 @@ def run(self, skip_to_time=-1):
             try:
                 val = getattr(self.h, var)[0].soma.cai
             except AttributeError as e:
-                print(e)
+                print("Problem passing neuronal output of %s to muscle in Sibernetic: %s"%(var, e))
+                val = 0
                 continue
             scaled_val = self._scale(val)
             values.append(scaled_val)
@@ -216,7 +218,13 @@ def run(self, skip_to_time=-1):
             try:
                 val = getattr(self.h, var)[0].soma.cai
             except AttributeError as e:
-                print(e)
+                if var=='a_MVL24':
+                    extra = "Note: not an issue as no muscle MVL24 in the real C. elegans"
+                else:
+                    extra = ''
+                print("Problem passing output of %s to muscle in Sibernetic: %s %s"%(var, e, extra))
+
+                val = 0
                 continue
             scaled_val = self._scale(val)
             values.append(scaled_val)
@@ -226,7 +234,8 @@ def run(self, skip_to_time=-1):
             try:
                 val = getattr(self.h, var)[0].soma.cai
             except AttributeError as e:
-                print(e)
+                print("Problem passing neuronal output of %s to muscle in Sibernetic: %s"%(var, e))
+                val = 0
                 continue
             scaled_val = self._scale(val)
             values.append(scaled_val)
diff --git a/sibernetic_c302.py b/sibernetic_c302.py
index e7827ab..b176fa1 100644
--- a/sibernetic_c302.py
+++ b/sibernetic_c302.py
@@ -9,7 +9,7 @@
 import pprint
 pp = pprint.PrettyPrinter(indent=4)
 
-script_version = '0.1.5' # This will change at different rate to C++ code...
+script_version = '0.1.6' # This will change at different rate to C++ code...
 
 DEFAULTS = {'duration': 2.0,
             'dt': 0.005,