hi, every peace of code with interactive elements gives me this error message systems : begin file walkfield at line 5 (./walkfield.tuo) javascript : loading script set fld (r:/tex/texmf-local/tex/context/base/java-fld.tex) ! Undefined control sequence. \dopresetfieldsymbol #1->\checkobjectreferences \doifobjectfoundelse {SYM}{#... \dosetupfield ...tfieldsymbol \@@DriverFieldValue \setbox \scratchbox \hbox ... \dofield ...abel ,\v!frame ,\v!horizontal ][][][]} \iftrialtypesetting \else ... <to be read again> \egroup \globalcommacommand ...tackedfieldnumber ]\egroup \bgroup \globalprocesscommaitem ...globalcommacommand {#1} \expandafter \globalproces... ... l.43 \smashedvbox{\fieldstack[sequence]} % ? every interactive element should produce this error, but i can also send a test file. best, peter