Error while programming to bootloader

[bennyrbk]

I've written a simple code for the PIC18F66K90 microcontroller and programmed it using the CCS C-Compiler and ICD-U64. I ran the program and it worked as expected.

I need my code to run without a programmer attached to it and to also run after a power cycle (turning the MCU off and on again).

But, when I try to program to bootloader, I'm running into an error which says
"ie_NOpen – device not open"

Is there any reason for such an error to occur? What are the steps I could try to fix this issue?

Thanks in advance.

[temtronic]

this...