>>VFP 9, Windows 10, latest updates.
>>
>>I made changes to methods in two class libraries, tested them and when all was OK, I rebuilt the project and the .exe.
>>
>>When I was preparing to deliver the changes, the dates on the .exe and one the .vcx's had changed to the current date, but the date on one of the .vcx's hadn't changed. Most of the changes were in the one that hadn't changed.
>>
>>I opened the class again, made an innocuous change and saved it... still the same old date on the .vcx.
>>
>>I restarted the machine and the date was correct.
>>
>>Any ideas?
>
>I guess that you have two copies of the same files.

I wish it were that simple.
It just happened again, with another project.
The files are definitely changed- the functionality reflects the changes.
The .exe has the correct date, but not the .vcx