note LanX <i> ... and gives a warning.</i><P> ah, thank you!<P> I missed there are warnings while testing in the debugger¹! <P> However this gives me the possibility to change <c>$SIG{__WARN__}</c> to deal with this kind of errors...e.g. by dieing. <!-- Node text goes above. Div tags should contain sig only --> <div class="pmsig"><div class="pmsig-708738"> <p>Cheers Rolf </div></div><P> 1)<strike>... hmm but why?</strike><P> UPDATE:<P> OK starting the debugger with -w switch helps. <c> :~$ perl -w -de0 ... DB<1> $x="6gg" DB<2> p -$x Argument "6gg" isn't numeric in negation (-) at (eval 6)[/usr/share/perl/5.10/perl5db.pl:638] line 2. ... </c><P> 852379 852393