21000   zERR INVALID LINK TYPE

Source:  NSS, Common Layer, Link

Explanation:  The specified link type is not supported.

Possible Cause:  A request was made for a link that is not supported by NSS. The current APIs cannot expose these features.

Action:  If this error occurs in the program you are running, contact a Novell Support Provider.

If you are programming an application, make sure the application requests a supported link type.