diff --git a/src/main/java/org/gcube/smartgears/handlers/application/request/RequestValidator.java b/src/main/java/org/gcube/smartgears/handlers/application/request/RequestValidator.java
index dc53501..992f977 100644
--- a/src/main/java/org/gcube/smartgears/handlers/application/request/RequestValidator.java
+++ b/src/main/java/org/gcube/smartgears/handlers/application/request/RequestValidator.java
@@ -81,7 +81,7 @@ public class RequestValidator extends RequestHandler {
 			//nothing to do, but avoids warnings
 		}
 
-	
+
 	}
 
 	private void validateScopeCall() {
@@ -125,36 +125,39 @@ public class RequestValidator extends RequestHandler {
 		ServiceIdentifier serviceIdentifier = Utils.getServiceInfo(call.context()).getServiceIdentifier();
 
 		String callerId = AuthorizationProvider.instance.get().getClient().getId();
+
+		List<Policy> policies = null;
 		try {
-			List<Policy> policies = authorizationService().getPolicies(scope);
-			for (Policy policy: policies) {
-				log.debug("policy: {}", policy.getPolicyAsString() );
-				
-				if (PolicyUtils.isPolicyValidForClient(policy.getServiceAccess(), serviceIdentifier ) || isPolicyValidForService(policy.getServiceAccess(), serviceIdentifier)) {
-					boolean toReject = false;
-					UserEntity entity = (((User2ServicePolicy) policy).getEntity());
-					if (entity.getIdentifier()!=null)
-						toReject = entity.getIdentifier().trim().equals(callerId);
-					else if (entity.getExcludes().isEmpty()) 
-						toReject = true;
-					else toReject = !entity.getExcludes().contains(callerId);
-					
-					if (toReject) {
-						log.error("rejecting call to {} : {} is not allowed to contact the service ",context.name(), callerId); 
-						invalid_request_error.fire("rejecting call to "+context.name()+": "+callerId+" is not allowed to contact the service: "+serviceIdentifier.getServiceName() );
-					}
-				}	
-			
-			}
+			authorizationService().getPolicies(scope);
 		}catch (Exception e) {
-			log.warn("error getting policies from context {}", scope, e);
+			invalid_request_error.fire("error contating authorization"); 
 		}
+		
+		for (Policy policy: policies) {
+			log.debug("policy: {}", policy.getPolicyAsString() );
+
+			if (PolicyUtils.isPolicyValidForClient(policy.getServiceAccess(), serviceIdentifier ) || isPolicyValidForService(policy.getServiceAccess(), serviceIdentifier)) {
+				boolean toReject = false;
+				UserEntity entity = (((User2ServicePolicy) policy).getEntity());
+				if (entity.getIdentifier()!=null)
+					toReject = entity.getIdentifier().trim().equals(callerId);
+				else if (entity.getExcludes().isEmpty()) 
+					toReject = true;
+				else toReject = !entity.getExcludes().contains(callerId);
+				if (toReject) {
+					log.error("rejecting call to {} : {} is not allowed to contact the service ",context.name(), callerId); 
+					RequestError.request_not_authorized_error.fire("rejecting call to "+context.name()+": "+callerId+" is not allowed to contact the service: "+serviceIdentifier.getServiceName() );
+				}
+			}	
+
+		}
+
 	}
-	
+
 	//TO resolve an error on Auth Portlet
 	private boolean isPolicyValidForService(ServiceAccess serviceAccess, ServiceIdentifier serviceId) {
 		String policyAsString = serviceAccess.getAsString();
-		
+
 		return policyAsString.equals("ALL") || policyAsString.equals(serviceId.getServiceClass()+":ALL:ALL") ||
 				policyAsString.equals(serviceId.getServiceClass()+":"+serviceId.getServiceName()+":ALL") ||
 				policyAsString.equals(serviceId.getFullIdentifier());