work fine for me.
P:\FWHTEST>harbour test /n /w
xHarbour 1.2.3 Intl. (SimpLex) (Build 20130903)
Copyright 1999-2013, http://www.xharbour.org http://www.harbour-project.org/
Compiling 'test.prg'...
test.prg(3) Warning W0001 Ambiguous reference: 'X'
test.prg(3) Warning W0001 Ambiguous reference: 'X'
test.prg(4) Error E0030 Syntax error: "syntax error at '-'"
1 error
No code generated