Fix revert path after load mechanisms

Author: filippomc

netpyne_ui/mod_utils.py

@@ -28,17 +28,22 @@ def is_loaded_mechanisms():
 
 def loadModMechFiles(compileMod, modFolder):
     # Create Symbolic link
-    if compileMod:
-        modPath = os.path.join(str(modFolder), "x86_64")
-
-        if os.path.exists(modPath):
-            shutil.rmtree(modPath)
 
-        os.chdir(modFolder)
-        subprocess.call(["nrnivmodl"])
-        os.chdir('..')
-
-    try:
-        neuron.load_mechanisms(str(modFolder))
-    except:
-        raise
+    if compileMod:
+        try:
+            owd = os.getcwd()
+            modPath = os.path.join(str(modFolder), "x86_64")
+
+            if os.path.exists(modPath):
+                shutil.rmtree(modPath)
+
+            os.chdir(modFolder)
+            subprocess.call(["nrnivmodl"])
+            os.chdir('..')
+
+            try:
+                neuron.load_mechanisms(str(modFolder))
+            except:
+                raise
+        finally:
+            os.chdir(owd)