On 12/06/2015 10:28, Ulrike Fischer wrote: > I'm getting an error in this document and don't understand it ;-( > > \documentclass{article} > \usepackage{expl3} > \begin{document} > \ExplSyntaxOn > > \keys_define:nn {test} > { > type .choices:nn = { A , B } > { > blub > }, > } > > %Works as expected: > \keys_if_choice_exist:nnnT { test } { type }{ C} > { > \keys_set:nn { test } {type=C} > } {choice~doesn't~exist!} > > \def\testvalue{A} > > %Error > \keys_if_choice_exist:nnnT { test } { type }{ \testvalue } > { > \keys_set:nn { test } {type=\testvalue} > } {choice~doesn't~exist!} > \ExplSyntaxOff > \end{document} > > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! > ! > ! LaTeX error: "kernel/key-choice-unknown" > ! > ! Key 'test/type' accepts only a fixed set of choices. > ! > ! See the LaTeX3 documentation for further information. > ! > ! For immediate help type H <return>. > !............................................... > > Why is the T-branch executed in the second case? Is is a bug? Yes: I see where this is. I'll fix shortly and update CTAN over the weekend. P.S. Will also look at your TeX-sx question on key setting! -- Joseph Wright