program attiny85 with arduino uno

Hello,

i try to program an attiny85 with an arduino uno. installed the attiny85 (preferences/board manager...) using this source:

https://raw.githubusercontent.com/damellis/attiny/ide-1.6.x-boards-manager/package_damellis_attiny_index.json

selected then the attiny85, clock '8mhz' (not too sure about the clock selection), port 'arduino uno...', programmer 'arduino as Isp'

opened the 'arduino Isp' example patch and if i try to upload it onto the board the error message comes up: 'serial was not declared in this scope'

can anyone help me? Thanks!

Anina

did you update the IDE while searching for a answer or only restart the system and try again

a little more info on that woudt be Helpfull to others facing the same issue.