sum_riemann() error

[JDW]

(08-12-2018 06:36 AM)Didier Lachieze Wrote:  You can try purge(k,n) and see if it helps.

When I type purge(k,n) and then press ENTER, my physical Prime says:

["No such variable k" "No such variable n"]

(But Virtual Prime also says that too.)

When I try the sum_riemann again on my physical Prime, I get the same Error: Bad Argument. So "purge" does nothing to resolve the problem.