エラーの検出 けんしゅつ訂正 ていせいじゃなかったです
erāno kenshu tsuto teiseijanakattadesu

Noun
Desu Copula

The polite, past negative form of エラーの検出と訂正

1. Wasn't error detection and correction.; Wasn't detecting and correcting errors.

Past/Perfective
Negative
Polite
Casual Register
Computing