Using the MERCI Calendar view I am sporadically getting the following error: "An illegal choice has been detected. Please contact the site administrator." I am new to drupal and php, and am looking for advice on how to debug this issue.
I am using MERCI 6.x-2.0+2-dev and my calendar has an exposed filter for reserved item_nid. On my site, I link to various filtered views of the calendar by passing this query string '?item_nid=' and occassionally following one of these links leads to the aforementioned error.