Zoitl Alois - 2015-04-22

The problem is that applications, subapplications, system editor, resource editor are views on the same model. If you hit save we need to save the whole model otherwise it can be that we save your system in a wrong state and it could get unloadable. I posted a longer discussion in about this in this forum thread: https://sourceforge.net/p/fordiac/discussion/708250/thread/f7aa469d/

Therefore I currently see no option to implement it differently in 4DIAC.

The save all button is when you have changes in several systems and/or have changes in function blocks it will save these all changes.