Hi Hans, there is a clash between \startinterface from mult-ini to set constants and variables and module documentation. The file s-mod-02.tex defines a paragraphe environment with the same name and as a result of this it's not possible to use a module in it's docu for examples. Run this example with 'context --ctx=s-mod foo.tex' to reproduce it: %M \usemodule[foo] \unprotect \startinterface all \setinterfacevariable {foo} {foo} \stopinterface \v!foo % should give 'foo' but '\v!foo' is undefined \protect \endinput Wolfgang