>From the datasheet:
bsf f,b
where  0<=f<=255 and 0<=b<=7
f is a file register and b is a bit number

So you are supposed to be trying to set bit b in file reg f.

The assembler doesn't know what b (or RX) is (or will be.)
b is a fixed number 0 - 7 which represents which bit to set.
So if you defined RX as a number in an include you'd be OK.
If RX is another file register or a redefined peripheral
register, you are out of luck.  In other words RX can't be
an EXTERN.  Yikes, now that I look again jump can't be EXTERN
either I don't think.  It's gotta be a file register and
not some address.  Looking at the definiation of EXTERN
directive syntax: extern ,label> [, <label> ] and labels
are addresses neither jump or RX can be labels.   So I
guess you gotta rethink what you are doing.  Looks like
brainfad to me. :-) :-)

-----Original Message-----
From: Stephan Kotze [mailto:stephank@IAFRICA.COM]
Sent: Wednesday, April 19, 2000 3:35 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: Object ASM Blues


Dear list

I am at my wits end. Can someone please explain to me why MPASM won't allow
me to do the following:

    LIST P=16F874
    include p16F874.inc
EXTERN RX, jump
    CODE
RECEIVE_BYTE
.....
    bsf jump,RX ; set bit for jump
......
    return
end

I keep getting this error when trying to make an object file

Error[151]   E:\OBJECT\MAST232O.ASM 35 : Operand contains unresolvable
labels or is too complex

Stephan