HP-71b Card reader "WRN: R/W Error"

[Dave Frederickson]

(11-12-2018 12:36 PM)Nenad (Croatia) Wrote:  What should I do next to find out whether the problem lies in the card reader or in the cards?

It looks like the card reader is bad. It should be tested in a known good 71 with a known good card.

Also, in line 10, LBL is not a valid statement. Use the NAME command, [f]C, to name the workfile to LBL, and see if that had something to do with it.

Dave