new err msg in vim 8 re: setting history size

Trying vim 8 on windows and get an error when it starts up
saying it didn't like my

"set history=250000"

statement in my .vimrc

Seems like correct syntax, now, is(?):

"history 250000"

But when I ran that, I got a different error:

'history' option is zero.

Am running gvim, but can't cut/paste its version
info, but vim says:

VIM - Vi IMproved 8.0 (2016 Sep 12, compiled Sep 20 2016 22:03:23)
MS-Windows 64-bit console version
Included patches: 1-6
Compiled by appveyor@APPVYR-WIN
Huge version without GUI.


----
How do I specify the history size in vim-8?

Thanks!
Linda

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