PRB: Error 41: "Memo File is Missing or Invalid" Error Message When You Access Tables on Computers That Are Running Windows 98 or Earlier from Computers Th
You use a computer that is running Windows 98 or earlier as a file server, and that computer hosts Visual FoxPro tables that contain memo fields. When users with computers that are running Windows XP try to access these tables, they may receive the following error message, even though there is nothing wrong with the memo file:
Error 41 "Memo file is missing or invalid."
The problem is caused by the difference between the file locking in Windows 98 and earlier, and the file locking in Windows XP.
Resolution: Use a computer that is running Windows XP as the file server.