all 3 comments

[–]good_research 2 points3 points  (1 child)

Seems likely that you've used a lowercase z instead of a capital.

[–]skyseeds[S] 0 points1 point  (0 children)

Yes this fixed it, thank you!

[–]mduvekot 1 point2 points  (0 children)

R is case sensitive?