Opening the Next Fiscal Year intentionally disables the Post to Prior Year function. The correct procedure is to ensure that there are no more correcting entries that need posted to prior year before opening the Next year.

Printing the Detail Listing report never gives an option to purge. Perhaps you mean the Posting Journal report or the Batch Status report, which are the 2 reports that can be purged? Also you must print to paper or file (not the screen) in order to allow purging a report.