So, I found the solution :
I really have to delete/recreate the trigger, which loads the rat.lua, every time I make a change in it. I suppose the problem seems to be, that DCS loads a script only once, after the corresponding trigger is created and the mission is then started ( I roughly remember to have read somewhere, that the contents of both lua files is beeing added to the .miz file?). I noticed that every new created trigger gets a different number, so I tried to change the number only, but no success.
It has to be deleted/recreated.
I couldn't reproduce the problem from yesterday, beeing stuck after trying to add the B757. Maybe I made a typo, but posted the correct code. I sat there for hours, my constitution was a little bit :crazy:
Today I missed the second " at : local cessna=RAT:New("RAT-CESSNA") and not one plane spawned (there were 6 in total). So maybe it was something like that. But I have no Idea, why didn't work after reverted the changes.
I added my test mission anyway. But it should work out of the box. Only later changes in the test.lua should not be adopted, without recreating the trigger.
Despite all the fumbling. Great Work, RAT (Moose) is really an enrichment for DCS! TEST.lua RAT-TEST PG.miz