Few days ago, I find a bug in this Keil version when I compile my project and want to create an HEX File, like you can read on: http://www.keil.com/forum/msgpage.asp?MsgID=3260 I repport the problem to the Keil support who send me by mail a new version of OH51 (the v2.6). The problem was due to the long NAME statement that I am using. If you have similar problem, ask for the 2.6 version of OH51. Special thanks to Andrew to help me.