Auto-update of 2120 startup application using compact flash

Just getting started with a 2120, but have one "tricky" question.  I want to have my executable run off the controller's memory, not the compact flash; however I also want the executable to check for software updates on a compact flash card.  In other words, if there is a compact flash card present when the app (controller) starts, and the executable on it appears correct (size, name check), then copy the file to that controller's startup folder to replace the existing app...  The executable would bypass normal operation at that point, provide LED feedback to alert the user to reset the controller (& remove card), and "voilà"!  We have an almost automatic compact-flash updatable, self-starting application...
Question(s):
- do I need to worry about whether I'm building the app to the controller's memory, to compact flash, or locally (to later copy onto compact flash)?
- are there any issues with having a program copy an update over itself in this way (different types of memory, when used, etc...)? Alternative would be to have a 2-stage app: 1 checks for update, launches the 2nd if no update (single app would be cleaner)
- am I missing anything else?
Thanks,
Phil

Hi!
  If I understand correctly... You can do following steps:
   - you develop your application for cFP2120, and download it to cFP's C: disk, then you can copy it to a compact flash. I am referring to a "developing" cFP2120.
   - in field, you have another cFP2120, running an application that you created before, and you insert compact flash with new exe.  You reboot controller.
   - the resident application checks for updates, and find it on CF card.  This boot application copies executable from CF to C: disk, (maybe better if you use .par extentions until opy does not finish!).
   - You manually (or programmatically) reboot controller with new application.
   This was my idea, but, because of customer doesn't asked me to proceed in implementing it, so I stopped, but I'm always interested in knowing if this can work.
   Some problems with this may be the coerence of libraries.....  Please, if you find this way succesful, let me know....
   Another possible solution is to use the "open VI reference" method, but I am not used with it.....
   Hope I wasn't too confusing
graziano

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