Hi everybody,I've been using Excel and VBA for various tasks for the past couple of months. Many of the macros I have written use data from a variety of workbooks. I have always changed from one open workbook to another- lets say the other is AnotherWorkbook.xls- by using Workbooks("AnotherWorkbook").ActivateI installed various new pieces of software a couple of days ago and afterwards when I tried to run some of the same macros, I got error messages. After a little investigation, I've discovered that VBA is now demanding that I include the .xls extension in the filename, so that I now have to doWorkbooks("AnotherWorkbook.xls").ActivateThis new fussiness on VBA's part is a real problem because it seems to be affecting some external DLLs over which I have no control. Has anyone encountered this problem before? Does anyone know how to fix it?Thanks in advance for any help.

You must have enabled the display of filename extensions in Windows Explorer (Tools->Folder Options ...->View->Hide Extensions for known File Types).