With a full Ada implementation, we do not have the problem ... We have built our company with the idea that we can help Ada programmers ... The questions are a little bit different when everything is written in Ada. We have numbers of customer projects using successfully XInAda, Unix signals , Ada tasking, in milatary, air traffic control, energy, and space ares Jean-Claude Mahieux Top Graph'X Email : [log in to unmask] http://ourworld.compuserve.com/homepages/topgraphx Tel : (33) 1 69 26 97 88 Fax : (33) 1 69 26 97 89