A co-worker in my office cannot open a 2004 Civil Design Drawing. There were no problems with the drawing when he closed it at the end of business yesterday. However, when he tried to open it this morning it had been corrupted somehow. When the file is opened, ABS attempts to open it, but locks up every time at 56%. All of the backups are corrupted too. Is there a way to audit this file without opening it so he can save all of the work he did yesterday?