Since it's sporadic, I'm guessing anti-virus issue. Make sure it's ignoring VFP files.

>I have a client that occasionally will be updating a transaction to several tables and will get a "cannot update cursor" message.
>I will close all tables, use the table in question again and update. All is fine.
>
>I can manually open the table, append a record, try to update a field and get the error. Try the same process again and all is fine.
>
>60-70 percent of the time it is the same file, but not always.
>
>They can run for days with no problem and then it will occur 2 to 3 times in one day.
>
>This app has been running fine for 7 years and this problem only started when they update to windows 7.
>
>They are at the point of trying to reload Windows 7 or even get a new machine.
>
>Any ideas?
>
>Thanks,
>
>Brad