The Op-Ed page in some copies yesterday carried an incorrect version of an article about military recruitment. The writer, an Army reserve officer, did not say, "Imagine my surprise the other day when I received orders to report to Fort Campbell, Ky., next Sunday," nor did he characterize his recent call-up to active duty as the precursor to a "surprise tour of Iraq." That language was added by an editor and was to have been removed before the article was published. Because of a production error, it was not. The Times regrets the error.