Hi All,

Having programmed 12F, 16F and 18F parts over many years with Melabs USB programmer with no problems I am struggling trying to program a 10F206 chip.

I get 2 error messages when trying to program the chip. "Calibration programming error" followed by "Erase Failed".
If I keep trying to program it once in a blue moon it will program correctly.

Here is what I have tried so far:

The chip is not in a circuit but stand alone.
Tried 2 chips both are showing this problem
Have tried both my home setup and my work setup. Both identical programmers and each PC running Windows 10.
The wiring to the PIC has been checked by others.


Both programmers are Melabs U2 USB programmer version 4.66
I have exhausted all my ideas and appreciate any clue as to the problem?


Many thanks,
Bob