I had several times the problem that the desktop B4P IDE hangs and the process must be killed by the task manager (Win XP). After that it could not be started, that means the IDE window was not visible.:signOops: The reason was a corrupt B4Pv6.ini file. The IDE started with no problem after I deleted it. I found that the first 2 values in this file contained "-32000". After a change to 0 the IDE started also correct (without loosing my settings).