diff --git a/brewman/brewman/security.py b/brewman/brewman/security.py
index 1a676177..1cf7f444 100644
--- a/brewman/brewman/security.py
+++ b/brewman/brewman/security.py
@@ -2,14 +2,19 @@ import uuid
 from brewman.models.auth import User
 
 def groupfinder(user_id, request):
-    if type(user_id) == str:
-        user_id = uuid.UUID(user_id)
-    perms = []
-    user = User.by_id(user_id)
-    for item in user.groups:
-        for perm in item.roles:
-            perms.append(perm.name)
-    perms = f7(perms)
+    if request is not None and 'perms' in request.session:
+        perms = request.session['perms']
+    else:
+        if type(user_id) == str:
+            user_id = uuid.UUID(user_id)
+        perms = []
+        user = User.by_id(user_id)
+        for item in user.groups:
+            for perm in item.roles:
+                perms.append(perm.name)
+        perms = f7(perms)
+        if request is not None:
+            request.session['perms'] = perms
     return perms
 
 
diff --git a/brewman/brewman/views/attendance.py b/brewman/brewman/views/attendance.py
index 6520e972..878352c7 100644
--- a/brewman/brewman/views/attendance.py
+++ b/brewman/brewman/views/attendance.py
@@ -1,6 +1,5 @@
 import datetime
 import uuid
-from pyramid.response import Response
 from pyramid.security import authenticated_userid
 from pyramid.view import view_config
 from sqlalchemy import or_
@@ -10,7 +9,7 @@ from brewman.models.master import AttendanceType, Employee
 from brewman.models.validation_exception import ValidationError, TryCatchFunction
 from brewman.models.voucher import Attendance
 from brewman.views.fingerprint import get_prints
-from brewman.views.services.session import  session_period_start, session_period_finish, session_current_date
+from brewman.views.services.session import session_period_start, session_period_finish, session_current_date
 
 __author__ = 'tanshu'
 
diff --git a/brewman/brewman/views/services/session.py b/brewman/brewman/views/services/session.py
index ad55a80c..83925585 100644
--- a/brewman/brewman/views/services/session.py
+++ b/brewman/brewman/views/services/session.py
@@ -36,6 +36,8 @@ def user_permission(request):
     user_id = authenticated_userid(request)
     if user_id is None:
         auth = {'isAuthenticated': False, 'perms': {}}
+    elif 'auth' in request.session:
+        auth = request.session['auth']
     else:
         user = User.by_id(uuid.UUID(user_id))
         auth = {'isAuthenticated': True, 'Name': user.name, 'UserID': user.id}
@@ -44,6 +46,7 @@ def user_permission(request):
         for item in Role.list():
             perms[item.name] = True if item.name in session_perms else False
         auth['perms'] = perms
+        request.session['auth'] = auth
     return auth
 
 
diff --git a/brewman/brewman/views/services/voucher/issue.py b/brewman/brewman/views/services/voucher/issue.py
index 0bb31551..210e7cf4 100644
--- a/brewman/brewman/views/services/voucher/issue.py
+++ b/brewman/brewman/views/services/voucher/issue.py
@@ -71,6 +71,13 @@ def issue_update_voucher(voucher, json, user):
     voucher.user_id = user.id
     voucher.last_edit_date = datetime.datetime.now()
 
+    for item in voucher.journals:
+        if item.debit == 1:
+            destination = item.cost_center_id
+        else:
+            source = item.cost_center_id
+    old_batch_consumed = True if source == CostCenter.cost_center_purchase() else False if destination == CostCenter.cost_center_purchase() else None
+
     for item in json['Journals']:
         if int(item['Debit']) == 1:
             destination = uuid.UUID(item['CostCenter']['CostCenterID'])
@@ -78,14 +85,8 @@ def issue_update_voucher(voucher, json, user):
             source = uuid.UUID(item['CostCenter']['CostCenterID'])
     if source == destination:
         raise ValidationError("Source cannot be the same as destination")
-    new_batch_consumed = True if source == CostCenter.cost_center_purchase() else False if destination == CostCenter.cost_center_purchase() else None
 
-    for item in voucher.journals:
-        if item.debit == 1:
-            destination = item.cost_center_id
-        else:
-            source = item.cost_center_id
-    old_batch_consumed = True if source == CostCenter.cost_center_purchase() else False if destination == CostCenter.cost_center_purchase() else None
+    new_batch_consumed = True if source == CostCenter.cost_center_purchase() else False if destination == CostCenter.cost_center_purchase() else None
     if new_batch_consumed != old_batch_consumed:
         raise ValidationError("Purchase cost center cannot be changed")
 
diff --git a/brewman/development.ini b/brewman/development.ini
index a9513820..ea197ba7 100644
--- a/brewman/development.ini
+++ b/brewman/development.ini
@@ -18,7 +18,7 @@ port = 6543
 # Begin logging configuration
 
 [loggers]
-keys = root, brewman
+keys = root, brewman, sqlalchemy.engine.base
 
 [handlers]
 keys = console
@@ -35,6 +35,11 @@ level = DEBUG
 handlers =
 qualname = brewman
 
+[logger_sqlalchemy.engine.base]
+level = DEBUG
+handlers =
+qualname = sqlalchemy.engine.base
+
 [handler_console]
 class = StreamHandler
 args = (sys.stderr,)