Nesstar sign-in info was changed. Your new sign-in information can be found in your user account accessible the main page of CSDA (archiv.soc.cas.cz/en) when scrolling down on the right side under the button "REGISTRATION AND ACCOUNT ADMINISTRATION". To this section, sign in with your original login you used for registration and your original password you used for registration. New login and password, which you find out after signing in, are valid only for the Nesstar data catalogue.
We apologize for any inconveniece this might cause to you.