Fatal error: Call to a member function summary_title()

Do you have a calendar view?

Did you updated from 2.x to 3.x version?

Is still a problem with the most recent version? Views and Full Calendar have had several updates since this issue was opened.

i am using the Calendar module. latest dev from today and views 7.x-3.5

and i get this when i try to clone the predefined calendar view.

Fatal error: Call to a member function summary_title() on a non-object in /home/admin/public_html/oow/sites/all/modules/views/plugins/views_plugin_display.inc on line 1192

Same error here as liquidcms, but also get the error trying to edit any calendar or group calendar view.

Same error for me. But the strange thing is I have 2 calendar views -- one for members and one for non-members. Built the same time and should be roughly the same except there are permissions and some items don't show on the "public" calendar. And that's the only one not working now (had been working in the past, but not sure when it stopped since we rarely use it -- most of us use the "project" calendar). So, 2 views, built from the same basic content type, but different permissions/taxonomy and now the one view doesn't work. I can't edit it (get the error mentioned above -- same line and everything) and when I go to the page where it lives, I get just the title, the month and the navigation (no calendar appears below it).

I have the same Views version and Calendar version as mentioned here. The site is still on 7.16 for core. I will try loading the latest dev of Views after hours and see if that does anything to help it.

I have a custom views plugin, and this error just popped up for me. Has anyone figured out the cause?

UPDATE:
I reinstalled my custom module and deleted the cache, and the problem went away.