Simulink I can not run simulation model.

I open simulink but I can't see the bartools therefore I can't run my simulation. 

Answer 1

[Nishant Gupta]

Follow these steps:

1. Refresh the file system caches using the following commands:

>> restoredefaultpath
>> rehash toolboxcache

2. Run the following command to rebuild Simulink and Library menus and toolbars:

>> sl_refresh_customizations

3. Close all the instance of MATLAB and then restart.

[Antonio Avilix Hernandez]

don't work