Thanx Taco, can I learn about these things somewhere read more? I tried luatexref-t.pdf and I didnt in fact guided. Thanx Jaroslav Dne 22.6.2010 7:55, Taco Hoekwater napsal(a):

Jaroslav Hajtmar wrote:

...

Hi, all.

How do I know (due Lua) that the counter has not been defined in ConTeXt (through the command newcount)?

I am trying testing :

if tex.count.mycount == nil then...

or

if tex.count.mycount == 'error' then...

then when counter isnt defined due \newcount\mycount, then test ending with error message.

When counter is defined due \newcount\mycount, \mycount=1

then test if tex.count.mycount == 1 then...

if token.command_name(token.create('mycount')) == 'assign_int' and tex.count.mycount == 1 then ... end

Best wishes, Taco