Hello, Atelier 1.2 as well 1.3 throws java.lang.NullPointerException when opening a class file. Never mind how to open the class file,  1) witin project explorer 2) atelier explorer 3) open resources  4) switcing between tabs (open files) etc..., I get these errors every time. Never seen this problem in Atelier 1.1. Do I miss something within the Eclipse environment?  Does anyone has the same problem? Best Regards, Roger de Coninck.