I have occationally had trouble using copy to Excel from the SQL window results. It creates an xls file in the temp folder but does not open it. When I try to open it myself, Excel says "unable to open file" and "Errors were detected in 'tmp001.xls,' but Excel was able to open the file my making the repairs listed below" then below it says "damage to the file was so extensive that repairs where not possible". I have reinstalled PL/SQL Dev. and Office 2003 and PL/SQL Dev. again. Using the latest release.