Hi guys, Some very interesting facts on hardware debugging. http://www.eetimes.com/electronics-blogs/other/4208931/Engineers-try-to-res= ist-finger-pointing-in-debugging-radar-jammer?cid=3DNL_EELife >From the article comes the real need to have a CRC check on the bootloader itself for the incoming image file. Regards, John =20 --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .