For issues give the following informations related to your problem: 

- [ ] System Designer version number: (ex: *v2.9.0*)
- [ ] System Designer platform: (ex: *macOS*)
- [ ] Your OS version: (ex: *macOS 10.13.3*)
- [ ] If use on a phone, please give the model: (ex: *iPhone X*)
- [ ] Steps to reproduce the problem

note: if possible, send us the system you used.