Yes this is possibly the problem as the error code returned means unprogramed location Art ----- Original Message ----- From: Alan Aldaba To: Sent: Sunday, May 21, 2000 5:49 PM Subject: Re: nopp : yansong gu wrote: : > : > I just tested my home made nopp. With all the excitement I loaded the Demof84.hex(led chaser), it some how returned an error when I tried to verify the program. The message is: : > failed at 0000. expected 3000, found 3fff. : > : > I tested the programmer before I put in the chip16F84A-20I/P and it was fine. can any one tell me what's going on ? : > Your help is greatly appreciated! : > : > YG : Hi, i got the same problem before...accdg. to M. Covington ,it is a data : comms problem, it's better to check your connection from the programmer : to parallel port...BTW, how long is your cable, the shorter the better. : : Regards, : : Alan