can i use form connector with options connector ?
is not working 
ok, i figured it out
select needs at least 1 option:
this one is working:
and this not:
error:
dhtmlxform.js:1208 Uncaught TypeError: Cannot read property ‘value’ of undefined
It was not expected limitation, problem was confirmed and fixed, in final version of dhtmlxform it will work without necessity to have at least one option in the select.