3*PLEG failures

all 3 of my PLEGS’s are returning this error.

Program Logic Event Generator (PLEG)[64] : Startup Lua Failed

weird as I have never had this problem before, even more surprising because I have 3 devices all that have failed and only one error message. All open but have nothing inside, ie no triggers, conditions etc, just a blank screen.
The only thing in common would be the PLEG Core, could this have become corrupted?

Restore your Vera from a previous nights backup … looks like something got corrupted.

CS was playing with the unit the night previous. Never thought about resetting from a backup. Did that and all is good in the world again. :slight_smile: Thanks