getprop: command not found

[JuanDeDiosInzunzaRodriguez]

i am getting this error message when i run "source get_fps.sh"

getprop: command not found

---------------- ***** -----------------
To work with dumpsys gfxinfo and retrieve profile data,
debug.hwui.profile must be set. And am restart may also need.
Enable profile data by command "setprop debug.hwui.profile true".
Then type "am restart" to restart framework.
---------------- ***** -----------------

i alredy did "adb shell setprop debug.hwui.profile true" and "adb shell am restart" but the error is still there