Hi I am relatively new to PICs and have very little electrical knowledge. I have been using a PIC16f877 on a prebuilt demo board. I am now at the stage where I want to use the chip away from the demo board. I have put the chip in a breadboard and put +-5V on pin 11 (V DD) and 0V on pin 12 (Vss) I have then tried to run a very simple program (moving a number in a register ) when I try to run the program (or reset or step through) I get the following error message: Error Performing Requested Operation I am programming via a MPLAB ICD programmer which recognises that the chip is there. what am I not doing have I not connected something that I should have? thanks Chris -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body