In SX Microcontrollers, SX/B Compiler and SX-Key Tool, gator wrote: Problem solved. I shortened the distance from SX-Key to the SX52 a little bit, let me say 1/2 inch. The distance is very critical, I knew it from experience in the past. Another PCB layout for another design works with Debugging and it gave me the hint to keep the focus on the distance. Tipp: For everyone who uses own PCB's (industrial types included) keep the distance to the SX-Key as short as possible. Now I have one SX-USB-Key left, grrrml... ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=432894#m432935 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2010 (http://www.dotNetBB.com)