Thanks Chad! This did it, I must have set the scale in the Spatial Reference dropdown menu at some point. All of my data driven mxds were doing the same thing, so I must have tried to set the scale there at some some point and made copies from that bad mxd. So my ArcMap is not haunted by a Ghayanese geographer as I had assumed. I love this listserve!!! You could check this: 1. Open the Data Driven Pages Options window 2. Verify that the Spatial Reference dropdown menu is set to "none" (putting in a value here will override the spatial reference set in the data frame) I would also recommend logging an incident with Esri technical support. They can walk you through how to fix the issue. Regards, Chad Chad Anderson, GISP Kristin DeRosia-Banick Environmental Analyst III State of Connecticut Department of Agriculture Bureau of Aquaculture Office: 203.874.0696 ext 112 Cell: 203.209.4023 Fax: 203.783.9976 Email: [log in to unmask] www.ctgrown.gov/Aquaculture ________________________________________ From: Unmoderated discussion list for Connecticut GIS Users <[log in to unmask]> on behalf of DeRosia-Banick, Kristin <[log in to unmask]> Sent: Monday, September 28, 2015 4:19 PM To: [log in to unmask] Subject: [CTGIS-L] MapBook keeps changing my coordinate system to Chana Metre Grid I am going in circles here and wondering if anyone can help. I had a perfectly functional mxd that I had enabled data driven pages in. It had been working fine for several years with no issues. All of a sudden, For some unknown reason, the coordinate system keeps changing to Ghana Metre Grid which I assure you I have never chosen. All of my layers are in NAD_1983_2011_StatePlane_Connecticut_FIPS_0600_Ft_US, and no matter how many times I change the coordinate system data frame property back to that, when I try to export the map pdfs as a group, it switches back to Ghana and "SOME" of my maps print out blank with no geographic info. I have tried removing background maps that I typically use from ArcGIS Online. It is usually not the same maps that print out with no geographic info, I think because at some unknown point it is switching to Ghana. When I scroll through the pages individually they look ok for awhile, but even then while I am scrolling through they are switching back to Ghana. Any ideas? [cid:780dd457-62e4-4c2e-b81d-5bbe9f860c28] Kristin DeRosia-Banick Environmental Analyst III State of Connecticut Department of Agriculture Bureau of Aquaculture Office: 203.874.0696 ext 112 Cell: 203.209.4023 Fax: 203.783.9976 Email: [log in to unmask] www.ctgrown.gov/Aquaculture ------------------------------------------------------------------------- This list (CTGIS-L) is an unmoderated discussion list for all CT GIS Users. If you no longer wish to receive e-mail from this list, you can remove yourself by going to http://listserv.uconn.edu/ctgis-l.html ------------------------------------------------------------------------- This list (CTGIS-L) is an unmoderated discussion list for all CT GIS Users. If you no longer wish to receive e-mail from this list, you can remove yourself by going to http://listserv.uconn.edu/ctgis-l.html