hi, Ihor, thanks for looking at this.
> This is because Org mode currently cannot distinguish between babel > backends that simply do not support variable assignments and babel > backends that are not loaded. currently, is it possible to see well enough what is going on to generate an error and abort the tangle? (off the top of my head i would think a `:var` in either of the situations you describe might be described as an error -- albeit a user error.) cheers, Greg
