Saving a file marks it for re-compilation

Question

Hello,
the following scenario: In CVI2013, open a project, edit the source code, build and run the project, and then quit the executable such that you're back in the IDE. Click the green triangle again and the executable will be run 'immediately'. Now, save the file and press the green triangle again - CVI starts compiling and building the project...
I don't think that this should be necessary, leaving some room for improvement
Solved!
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Answer 1

Hi Wolfgang,
This is an interesting scenario. Unfortunately, I don't think it's possible to avoid this recompile in 2013, without other undesirable side effects.
In CVI 2012 and earlier, CVI always compiled files from memory. So, when you saved the file after building and running, that did not trigger the need to recompile after the save.
In CVI 2013, all compilation needs to be done from disk instead. You can still compile files without saving them first only because CVI makes a temporary copy of those files (you can see these copies in the UnsavedChanges folder under the project's configuration folder).
The reason the recompile happens after the save is because when you save the file after running, the timestamp of the saved file is later than the timestamp of the object file that was created from the temporary copy from UnsavedChanges.
To avoid this problem, when you save the file CVI could instead copy the temporary file from the UnsavedChanges to its regular location, if and only if you save it without making any additional changes. The problem, however, is that the timestamp of the regular file would be older than the time when the user explicitly chose to save the file, and I don't think that it's a good idea to have this discrepancy.
If you'd like to work around this issue, you could choose to copy the file yourself from the UnsavedChanges folder, instead of saving it (and then discard the changes in the editor). You could even use some script that you add to the Tools menu, to make it faster. But you'd have to be very careful to only do this when you know that you have not made any new changes to the file.
Luis