diff --git a/src/main/java/au/com/royalpay/payment/manage/appclient/core/impls/RetailAppServiceImp.java b/src/main/java/au/com/royalpay/payment/manage/appclient/core/impls/RetailAppServiceImp.java
index 6d674e4bf..f022a5aa3 100644
--- a/src/main/java/au/com/royalpay/payment/manage/appclient/core/impls/RetailAppServiceImp.java
+++ b/src/main/java/au/com/royalpay/payment/manage/appclient/core/impls/RetailAppServiceImp.java
@@ -388,7 +388,7 @@ public class RetailAppServiceImp implements RetailAppService {
         query.setGateway_app("11");
         String clientType = device.getString("client_type");
         DeviceRegister register = deviceSupport.findRegister(clientType);
-        Assert.notNull(register);
+        Assert.notNull(register,"Device is not registered");
         int client_id = device.getIntValue("client_id");
         JSONObject client = clientManager.getClientInfo(client_id);
         String timezone = client.getString("timezone");
@@ -779,7 +779,7 @@ public class RetailAppServiceImp implements RetailAppService {
         Date now = new Date();
         JSONObject res = merchantInfoProvider.clientCurrentRate(clientId, now, "Wechat");
         JSONObject client = clientManager.getClientInfo(clientId);
-        Assert.notNull(client);
+        Assert.notNull(client,"Client is null");
 
         JSONObject[] channels = new JSONObject[3];
 
@@ -804,7 +804,7 @@ public class RetailAppServiceImp implements RetailAppService {
         Date now = new Date();
         JSONObject res = merchantInfoProvider.clientCurrentRate(clientId, now, "Wechat");
         JSONObject client = clientManager.getClientInfo(clientId);
-        Assert.notNull(client);
+        Assert.notNull(client,"Client is null");
 
         ArrayList<JSONObject> channels = new ArrayList<>();
         if (client.getBigDecimal("customer_surcharge_rate") != null) {
@@ -1095,7 +1095,7 @@ public class RetailAppServiceImp implements RetailAppService {
             if (params.getString("type").equals("Merchant")) {
                 for (String partner_code : codes) {
                     JSONObject client = clientManager.getClientInfoByMoniker(partner_code);
-                    Assert.notNull(client);
+                    Assert.notNull(client,"Client is null");
                     List<JSONObject> tokens = clientDeviceTokenMapper.listTokensByClient_id(client.getInteger("client_id"));
                     if (null != tokens && tokens.size() > 0) {
                         for (final JSONObject devToken : tokens) {