I'm getting this problem when I try to open my workspace. "Tree element '/hardware_help/hardware.ditamap' not found." The file is clearly there and completely healthy and valid. What might this mean otherwise? As a secondary question, how compatible are Oxygen versions with each other? Wendy Loreti Senior Technical Writer Vocollect, Inc. 703 Rodi Rd. Pittsburgh, PA 15235 www.vocollect.com <http://www.vocollect.com/> CONFIDENTIALITY NOTICE This message, together with any attachments, may be legally privileged and is confidential information intended only for the use of the individual or entity to which it is addressed. It is exempt from disclosure under applicable law including court orders. If you are not the intended recipient, you are hereby notified that any use, dissemination, distribution or copy of this message, or any attachment, is strictly prohibited. If you have received this message in error, please notify the original sender and delete this message, along with any attachments, from your computer.