Here is the code. PIC16F870 by the way.

define OSC 20
define adc_bits 10
define adc_sampleus 50
trisa = 255
adcon0 = 129 'Internal clock, channel 0, switched on
adcon1 = 142 'Right justified (10 bit), channel 0 analog

adcin 0, temp
let temp1 = temp * 3
let temp2 = (temp * 5) / 100
let temp = temp1 + temp2
serout serial1, 2, ["A",#temp,"AA"]

This exact same program has been working fine for around 4 years. I have always had the same issue. If using the compiler with the popup window with progress bars the A/D does not work (same with many different chips, and projects) if using the other compiler everything was fine.

I have been using PBP for many years with micro code studio, and have always had the same issue. I no longer have a 32 bit operating system, so I can't even install my older version of PBP, and use the doss compiler. With PBP 3 I only have the option to use MPASMX or not, and both give the same result, the same result that I'v had since PBP 2.4ish.