I'm not finding a "debug bit" in the config. The device selected is "PIC12F675" and that is the only option I see for that device in the list. There is no debug version, as far as I can find, e.g. no PIC12F675-ICD listed. The chip we are connected to IS a PIC12F675-ICD. The project build configuration is debug, not release Under build options, on the compiler tab, Debug optimization is on. Config is currently FOSC Oscillator Selection bits=20 RC oscillator: I/O function on GP4/OSC2/CLKOUT pin, RC on GP5/OSC1/CLKIN WDTE Watchdog Timer Enable bit=20 WDT disabled PWRTE Power-Up Timer Enable bit PWRT disabled =20 MCLRE GP3/MCLR pin function select GP3/MCLR pin function is digital I/O, MCLR internally tied to VDD =20 BOREN Brown-out Detect Enable bit BOD enabled =20 CP Code Protection bit Program Memory code protection is disabled =20 CPD Data Code Protection bit Data memory code protection is disabled =20 Oh... hang on, there it was... Should have been "INTOSC" not "RC oscillator" I was confusing that setting for the /internal/ RC oscillator... Ok, all better now... Thanks for the hint. PICList rocks as always! -- James Newton 1-970-462-7764=20 -----Original Message----- From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of Funny NYPD Sent: Saturday, November 13, 2010 03:18 To: Microcontroller discussion list - Public. Subject: Re: [PIC] MPLAB 8.6,PICKit 2,AC164110,AC162050:PK2Error0028 This is a warning, when some of the configuration bits were not set up right,=20 which will prevent the chip from entering the debugging mode. E.g. Debug bi= t wasn't turned on, WDT wasn't turned off, etc. Funny N. Au Group Electronics, http://www.AuElectronics.com http://www.AuElectronics.com/products http://augroups.blogspot.com/ --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .