Error while installing app

I am getting following error while installing app in site.

bench frappe --install_app erpnext ics
frappe app is not installed. Run the following command to install frappe
bench get-app frappe GitHub - frappe/frappe: Low code web framework for real world applications, in Python and Javascript
Traceback (most recent call last):
File “/usr/local/bin/bench”, line 9, in
load_entry_point(‘bench==0.1’, ‘console_scripts’, ‘bench’)()
File “/home/makarand/workspace/newSupport/bench-repo/bench/”, line 42, in cli
return old_frappe_cli()
File “/home/makarand/workspace/newSupport/bench-repo/bench/”, line 91, in old_frappe_cli
os.execv(f, [f] + sys.argv[2:])
OSError: [Errno 2] No such file or directory

If you are running the latest bench:

run bench install-app erpnext

see bench help for the latest commands.