Is it necessary to “train” rasa every time if we do some changes in any one of these files “domain.yml”, “nlu.md” and “story.md” files.?
@Zeusturbo Yes
If you not changed the nlu.md and story.md it will show message nothing changed and if you changed in domain.yml it will trained. Basic thumb rule.
Oh very well… So I’m not the only one 
Thanks 
@Zeusturbo your welcome
close this thread for future reference for others.