1

DeviceLibrary/DeviceLibrary/ServerCommunication.cs

@@ -126,7 +126,7 @@ namespace DeviceLibrary
                     operation.data.Add("singleIn", "false");
                 }
                 Operation resultOperation = HttpHelper.Post(GetPostApi(), operation, 5000, printlog);
-                if (operation.seq != resultOperation.seq)
+                if (operation.seq != resultOperation?.seq)
                 {
                     Thread.Sleep(1000);
                     SendInStoreRequest(codelist, reel, printlog);