Hope this is an easy one for somebody:
source ~/.cshrc
, then everything looks fine.I finally found the problem here:
When miniconda installs, it created a new .tcshrc file, which did not previously exist.
csh must prefer sourcing from .tcshrc, and ignores .cshrc if it is found.
I just had to delete the .tcshrc file that miniconda created and everything works again.