diff --git a/ckanext/odsh/tools.py b/ckanext/odsh/tools.py
index 9fbd4f90a879f595418f1e493f315b2a2ebcc58c..ab7c1ba60885d1a4589b1bc533f9d22e4d74d27b 100644
--- a/ckanext/odsh/tools.py
+++ b/ckanext/odsh/tools.py
@@ -13,22 +13,33 @@ def add_attributes_resources(context, resource):
     for item in resources:    
         if item.get('id') == resource.get('id'):
             path = get_filepath_to_resource(resource)
-            with open(path, 'rb') as file:                  
-                if not item.get('size'):
-                    resource_size = os.path.getsize(path)
-                    item.update({'size': resource_size})
-                file.seek(0)
-                hash = calculate_hash(file)
-                item.update({'hash':hash})
-                file_type = magic.from_file(path, mime = True)
-                if file_type == 'application/pdf':
-                    file.seek(0)            
-                    pdf = pdftotext.PDF(file)
-                    number_of_pages = len(pdf)
-                item.update({'number_of_pages':number_of_pages})
-                item.update({'hash_algorithm': 'http://dcat-ap.de/def/hashAlgorithms/md/5'})
-                resources[i] = item 
-            break
+            if os.path.exists(path):
+                with open(path, 'rb') as file:                  
+                    
+                    #size
+                    if not item.get('size'):
+                        resource_size = os.path.getsize(path)
+                        item.update({'size': resource_size})
+                    
+                    #hash
+                    file.seek(0)
+                    hash = calculate_hash(file)
+                    item.update({'hash':hash})
+                    
+                    #hash algorithm
+                    item.update({'hash_algorithm': 'http://dcat-ap.de/def/hashAlgorithms/md/5'})
+                    
+            
+                    #number of pages
+                    file_type = magic.from_file(path, mime = True)                    
+                    if file_type == 'application/pdf':
+                        file.seek(0)            
+                        pdf = pdftotext.PDF(file)
+                        number_of_pages = len(pdf)
+                        item.update({'number_of_pages':number_of_pages})
+
+                    resources[i] = item 
+            break                         
         i = i + 1  
     package.update({'resources':resources})
     toolkit.get_action('package_update')(context, package)