Richard, it worked, Thanks, although it raises as many questions as it answers.

This works

Code:
        for Avar= 0 to 7   
                cycle=4    ;cycle is number of cycles of pulse    
            for Duty=0 to 220 step 1
                pwm Avar,Duty,cycle
                next Duty
                cycle=2    ;cycle is number of cycles of pulse
            for Duty=220 to 0 step -2
                pwm Avar,Duty,cycle
                next Duty
                low Avar
        next Avar
This works, on PortB, why? This should work on PortA. PortB, I tought, would be 8-15.
Yes I had used ‘Symbol Port_Pin=PortB’ which would set PortB to 0-7 but now I’m not using Port_Pin in the routine. I remember there is a file somewhere that sets the port numbers but I can ‘t remember what or where it is. I may have changed the default numbering over the years. Oh well, it works and now and I’m happy. I’m surprised I had not seen an example for PWM that used this method to cycle through LEDs. Too easy! thank you both for your input!


Code:
; 16F886
@ DEVICE INTRC_OSC,MCLR_ON,BOD_OFF,WDT_OFF,LVP_OFF

define  osc 8
;------[ Set Hardware ]------------------------------------------------------
    OSCCON=$70    '$70=8MHz, $60=4MHz 
    ANSEL=$00
    ANSELH=$0    
    ADCON0=$00
    CM1CON0=0 
    CM2CON0=0
    OPTION_REG=0    ; INTOC RB0 set to interrupt on falling edge
    
	PORTA=%00000000
	PORTB=%00000000
	PORTC=%00000000     ' RAC6&7 set with Hserout command
	TRISA=%00000011      ' PORTA RA0 & RA1 input all other output
	TRISB=%00000000      ' PORTB all set to Onput
              TRISC=%00000000      ' PortC     RC7&RC6 for hserout
;--[ VARIBLES, CONSTATNS ]-------------------------------------------------
;  Symbol Port_Pin=PortB   ; To define PortB port numbers start at RB.0    
    Avar    var byte   
    Duty    var byte            
    Cycle   var byte    
;--[ Main Program ]-------------------------------------------------------------
Start:
    gosub FadeTest
     
;--[ Routine for fade on and fade off LEDs]------------------------------------
FadeTest:
        for avar = 0 to 7   
                cycle=4    ;cycle is number of cycles of pulse    
            for Duty= 0 to 220 step 1
                pwm Avar,Duty,cycle
                next Duty
                cycle=2    ;cycle is number of cycles of pulse
            for Duty= 220 to 0 step -2
                pwm Avar,Duty,cycle
                next Duty
                low Avar
        next Avar
    Return  
         end