I have a Greenstone piece on which I built two collections, but this morning when I did a search on them, I got a page full of errors from both of the collections.

it starts like this:

Oops!
An error occurred during the construction of the cgi page. The error
log, /usr/local/gsdl/etc/error.txt, contains the following information:

ERROR: Invalid collection: argus5
documentaction::do_action called with NULL collectproto

Does anyone know something about what happened? What can I do to fix or avoid the problem?

Thank you very much!

Xiao