I have been working with ArcGIS9.3.1. and Xcel2010 (God knows what automated updates have been inflicted on me since original installation) on a Windows8 computer. I have been able to import and work with Xcel spreadsheets in this setup but from time to time, the connection to selected spreadsheets is lost whereas others in the same map or project work fine. Try to reconnect the lost spreadsheets generates the following message:
Failed to connect to database. General function failure. External table is not in the expected format.
This is very annoying and an impediment to my workflow. How can it be overcome|?