50g

> Sorry but for me it's ok, I have any problems.
> May be it's a problem with your flag?!?!


More than likely yoy have ZINTs instead of reals.  If the numbers
don't have a '.' at the end, they are a symbolic object.  Many of the
older programs later ported to the 49 never changed things to make it
work.  Set you calc to approximate so you will get this

{ 1. -2. 3. } instead of {1 -2 3}

TW