The phrase "acknowledged an error" is correct and usable in written English.
It can be used when someone admits to making a mistake or recognizes a fault in their actions or statements.
Example: "After reviewing the report, the manager acknowledged an error in the calculations that affected the final results."
Alternatives: "admitted a mistake" or "recognized an error".
Mr. Allen took responsibility for the original ad and acknowledged an "error in the scripting".
The Metropolitan Museum of Art has acknowledged an error that was pointed out by a seventh-grade boy from West Hartford, Conn., in a 6th-century map of the Byzantine Empire.
In a statement, the ABC acknowledged "an error in judgement in allowing Zaky Mallah to join the audience and ask a question" – but vowed that Q&A would "continue to raise issues that are provocative and controversial".
Interest in the glaciers intensified in 2010 when the Intergovernmental Panel on Climate Change, the United Nations body that publishes periodic summaries of climate science, acknowledged an error in its 2007 report.
Mr. Joffrin has also acknowledged an error in not contacting Mr. Strauss-Kahn for comment — a basic rule of journalism — before publishing the extracts and displaying his photo on the cover.
At a press conference in Paris, the center-right Republican candidate acknowledged an "error of judgment" but vowed to stay in the race.
We also acknowledge an error in the specification of a utility function in our previous paper.
Still, he would come to acknowledge an error in his email.
We also make allowances if the politician or interest group acknowledges an error was made.
Harwood posted a tweet two weeks ago acknowledging an error in his comparison of how the richest and poorest would fare.
After 25 minutes in the couple's home, the officials appeared to acknowledge an error had been made and retreated, leaving Qu terrified and Watkinson in tears.
