変更 and 訂正: changing a plan or correcting an error
Compare schedule changes with corrections, without assuming that every change fixes an error in the original information.
Changing details or conditions
変更, read へんこう, means changing an arrangement or condition. 集合場所を駅前に変更しました。 means that the meeting place was changed to the area in front of the station.
新しい予定に合わせて時間を変更しました。 says that the time was changed to fit a new schedule. It does not say that the original time was written incorrectly.
Correcting something written or said
訂正, read ていせい, means correcting erroneous information. 資料の日付を訂正しました。 means that the date written in the document was corrected.
名前の漢字に誤りがあったので、訂正しました。 says that the kanji in a name was corrected because it contained an error. Identify what was wrong.
Different reasons for changing a date
開催日を変更しました。 says that the event date was changed. 案内に書いた開催日を訂正しました。 says that the event date written in the notice was corrected.
A correction changes content too, but 訂正 focuses on fixing an error. Check whether a notice changes the actual schedule or only corrects its written representation.
Does 集合場所を変更しました。 alone establish that the original notice contained a typo?
Show the answer and why
No. It only states that the meeting place was changed. An error could be identified with wording such as 誤りを訂正しました。