操作 そうさ対象 たいしょう集合 しゅうごうではありませんでした
sōsa taishōshūgōdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 操作対象集合

1. Was not an operable set.; Was not a target set.; Was not an object of operation.

Past/Perfective
Negative
Polite
Formal Register
Computing