Genrepox 3.0 bug:

if _grx_lastpage is used with without abbreviation TO PRINTER or PREVIEW
clauses, genrepox causes syntax error!

Reason:
genrepox.prg contains the following lines:

IF plGRXDoLastPage && pre-run, do get the highest page-number...
lcGRXRep2Expr=UPPER(pcGRXRepExpr)
lcGRXRep2Expr=STRT(lcGRXRep2Expr,"TO PRIN","")
lcGRXRep2Expr=STRT(lcGRXRep2Expr,"TO PRINTER","")
lcGRXRep2Expr=STRT(lcGRXRep2Expr,"PREV","")
lcGRXRep2Expr=STRT(lcGRXRep2Expr,"PREVIEW","")

assume that pcGRXRepExpr contains ... PREVIEW ... clause.
THe code above causes first preview STRT() to be executed, so PREVIEW
is translated to

.. IEW ...

line.

Solution: change the order of lines to

lcGRXRep2Expr=STRT(lcGRXRep2Expr,"TO PRINTER","")
lcGRXRep2Expr=STRT(lcGRXRep2Expr,"TO PRIN","")
lcGRXRep2Expr=STRT(lcGRXRep2Expr,"PREVIEW","")
lcGRXRep2Expr=STRT(lcGRXRep2Expr,"PREV","")