A strange thing happened today. I made a new landscape, did some crops renders, worked ok, saved and opened on another machine to do a better total. Parse error on line 4076 (about), and almost all connections were broken

. I managed to reline, did some crops again, worked ok, and it will now go to the other machine. I'll tell you what happens.
One thing that could have been the problem is a connection between the first surface shader containing color and the color input of the next surface shader. But I think that should be no problem.
Anyway, what does parse error mean? Caused by a loop? But then the line would have been red when trying to connect, wouldn't it?
Oh, and when I reopened 2 cloud layers were gone and a population. Vanished completely