Thanks Scott. I think you and Ron are both right. I'm downloading the book now. Thanks again. David ... "The latest Document on the FBM224 is B0400FK-E 5/28/08" Confidentiality Notice: The information contained in this message is private and confidential. This information is intended only for the individual or entity named above. If the reader of this message is not the intended recipient, you are hereby notified that any use, review, dissemination, distribution, copying or action taken based on this message or its attachments, if any, is strictly prohibited. If you are not the intended recipient, please contact the sender by reply email and delete or destroy all copies of this message and any attachments. Thank you. _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: //www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave