Well, I haven't changed where these files have been saved in ages, so I doubt that's the problem.

And I re-compile all my forms each time I rebuild the app -- which happens pretty much daily.

About the anti-virus -- it checks files that I create locally on my computer?

>>All my work is local (no network involved).
>>
>>Using Trend Micro Internet Security. (Am curious why this would be relevant and, if so, why it would just have started recently)
>>
>>>>I've been getting the following error message every day or so:
>>>>
>>>>Memo File (Form-Name).SCT is missing or invalid.
>>>>
>>>>This occurs after I have been working on a form, when I try to save it. It's not the same form every time or anything, so I can see no pattern.
>>>>
>>>>Now, obviously, the SCT had to exist when I opened the form to edit it, and I can see that it exists, so it must have become invalid.
>>>>
>>>>How can that happen, if I am saving it???
>>>
>>>What is the antivirus software you're using and are you saving locally or on the Network?
>
>Usually the symptoms you indicate are related with either saving on a network or when these files are checked by the antivirus. Also make sure that you have read-write access to the place you're saving the forms. And it may help to do
>compile form myForm.scx for all of your forms.