>>>>>If you build an executable with VFP 9 SP2 (without using any specific new features of SP2) and try to run this .EXE on the PC where VFP 9 SP1 runtime is installed, will it bomb?
>>>>
>>>>
>>>>don't think so
>>>
>>>Thank you. As you can probably guess from my question, I am trying to update the application to VFP 9 SP2 but many customers still have the VFP 9 SP1 on their desktops. And I want to be sure that it won't be a problem.
>>
>>I'd be inclined to get users to upgrade their runtime e.g. include a VERSION() check in your code, and if the runtime isn't the latest, issue a warning and point them to http://archive.msdn.microsoft.com/FoxPro/Release/ProjectReleases.aspx?ReleaseId=125 .
>
>My users are not very easy to "make" do anything. And if they have to do something they will not be happy. If you think that running VFP 9 SP2 app on VFP 9 SP1 run-time could pose problems, I will stay with SP1. I don't have to upgrade.
>Thank you.

Users are funny that way, aren't they? ;-) We should never forget user is a four letter word. Of course we would be useless without them.