Dear list, I have the following sample: \starttext \def\numbersfname {\cldcontext{string.match([[\env{fname}]], "\letterpercent d+")}} \ctxlua{ c = context.getvariable("environment", "fname") or "a" } \ctxlua{ d = [[\env{fname}]] } tex: \numbersfname\\ \doifelse{} {123}{yes}{no}\\ c: \cldcontext{c}\\ \doifelse{\cldcontext{c:match("\letterpercent d+")}} {123}{yes}{no}\\ d: \cldcontext{d}\\ \doifelse{\cldcontext{d:match("\letterpercent d+")}} {123}{yes}{no} \stoptext For compilation, I run the command: context --purgeall --arguments=fname={abc123} test-file.tex These things are failing: 1. I don’t know how to get \numbersfname equal to "123". I don’t know what I’m doing wrong. 2. Is there no Lua version of \getvariable{...}{...}? 3. I’m trying this on a Linux box, but on Windows I would say that Lua variable "d" is empty. I need to get the number from \env{fname} and I don’t know what I’m missing. \doif is the way to test whether it’s right. Could anyone explain me what I’m missing here? Many thanks, Pablo -- http://www.ousia.tk