Green’s Dictionary of Slang

error n.

SE in slang uses

In phrases

and no error [var. on and no mistake under mistake n. ]

a general intensifier, certainly, without any doubt.

[UK] ‘’Arry on His ’Oliday’ in Punch 13 Oct. 160/2: Bin took for a Nob, and no error this time.
[UK] ‘’Arry’s Spring Thoughts’ in Punch 17 Apr. 185: It’s a fair bloomin’ Mix, and no error.
[UK]J.D. Brayshaw Slum Silhouettes 3: ’E could ’andle ’is dooks, an’ no error: the way ’e set abaht Bill was a fair treat .
[UK]A.N. Lyons Arthur’s 27: We ploughed into it an’ no error.
[NZ]‘Anzac’ On the Anzac Trail 71: I guess we looked some fighting men, and no error.
[UK]J. Curtis There Ain’t No Justice 62: Tommy was captivated. She was the goods and no error.
[US]O. Strange Sudden Takes the Trail 146: You’ve made a gaudy muck o’ things, an’ no error.