I tried Lucas Vieites (thanks) suggestion and the problem was no more. Next time i'll remember trying it out :).
So I investigated a little more and found the culprit, a lonely argument (see screenshoot pls). Don't know how it got there alone...
@Frank, I tried to find Lex's email about the build menu entries but had no luck. As a side discovery Lex writes very long emails :p
Kind Regards André