Questions about the Heroes 4 map editor.

Dear General ZeT! Help me! I'm desperately trying to create a map, I have a LOT of ideas, but I can't seem to make it work! There are quite a few problems. The last time I was working on a map, everything was fine, I checked it with "Check map," and it told me that everything was okay, the map was correct. Then I saved it, and it wrote to me in English that the map would be deleted and lost. I clicked "OK," the editor finished saving, I exited, and it not only doesn't load the map into the game (and if it does, it loads a regular map without my additions), but it also shamelessly says that this map weighs 1 byte, meaning it's not allowed in the game! I've tried everything – it doesn't work! Help me!!!!

Hello everyone! I'm creating a large-scale map with over 100 quests, but I'm having some difficulties in making it unique.
How exactly can I add such a script to the map?
For example, what I mean is this:
When standing at point N, a script should trigger that performs the following function:
Give N creatures -15%, for example
Combat -15%
Give artifact -15%
Give resource -15%
40% chance of failure.
The idea is to check for the presence of artifact N, then do what I described above, and in the case of these 40%, the artifact is taken away, which activates this event. How can I create such a script, or at least something similar?