Persistent Programming error in PIC16F84A programming

[neoaspilet11]

Hello Everybody,

I just encountered this problem today: When I blast my program to the MPU using a JDM programmer it will always say Verify Failed at a certain address then when I blast again it will fail again at different address. Everytime I re blast my program, it will fail at a different address. And I check the failed address to my Program code and indeed they were different from the MPU program memory.

Has anybody has encountered and solved this problem?

Please Help.

Thanks
neo

By the way I used the programmer and the MPU before and it works fine. I just encounter this problem today.

 

[waseem]

Hi!
I faced similar problems almost an year ago and the reason was the length of the programming cable.
what software and hardware are u using?.
Regards