Dionne Warwick's got no hard feelings towards the broadcaster that was accused of mistaking her for Gladys Knight on live TV ... callin' it an honest mistake!!!
Dionne tells TMZ ... she doesn't think Chanda Rubin, who caught some serious flack for the flub, would've intentionally mixed the two up.
The singer's buying the broadcaster's explanation for what went down, too.
In case you missed it, Dionne was front and center on TV during the U.S. Open, but was instead referred to by Chanda and Mary Carillo as Gladys -- obviously, the Internet had a field day.